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Contents list for CrystEngComm, issue 11, 2009

Front cover
CrystEngComm, 2009, 11, 2213
DOI: 10.1039/b920787m

See Yu et al., pp. 2291–2296. 26-facet Cu₂O microcystals with core–shell structure. Image reproduced by permission of Professor Dr Ting Yu from CrystEngComm, 2009, 11, 2291.

Inside front cover
CrystEngComm, 2009, 11, 2214
DOI: 10.1039/b920788k

Contents and Chemical Technology
CrystEngComm, 2009, 11, 2215
DOI: 10.1039/b904839c

Highlight

Molecules embracing in crystals
Ian Dance and Marcia Scudder,  CrystEngComm, 2009, 11, 2233
DOI: 10.1039/b904479e

Molecular embraces are multi-armed, attractive, mutual, and concerted.

Communications

Observation of the least stable conformer of 1,4-cyclohexanedicarboxylic anions in a samarium coordination architecture
Jian Lü, Wen-Hua Bi and Rong Cao,  CrystEngComm, 2009, 11, 2248
DOI: 10.1039/b909821f

The least stable conformer of 1,4-cyclohexanedicarboxylic anion has been serendipitously observed as crystallographic evidence in a coordination polymer containing 4-f metal samarium.

Combination between metal–ligand coordination and hydrogen bond interaction: a facile route for the construction of 3D coordination networks with the ability to include relatively large aromatic molecules
Ryo Sekiya, Shin-ichi Nishikiori and Reiko Kuroda,  CrystEngComm, 2009, 11, 2251
DOI: 10.1039/b911849g

A combination between metal–ligand coordination and hydrogen bond interaction allows the construction of new 3D coordination networks which exhibit the ability to include relatively large organic molecules.

A three-dimensional metal–organic framework based on a triazine derivative: syntheses, structure analysis, and sorption studies
Zhiyong Guo, Jiangbo Yu, Guanghua Li, Zhenjun Si, Huadong Guo and Hongjie Zhang,  CrystEngComm, 2009, 11, 2254
DOI: 10.1039/b903932e

A novel metal–organic framework [Cu₃(m-TATB)₂Py(CH₃OH)₂] (1) constructed of a triazine-based ligand, 3,3,3-s-triazine-2,4,6-triyltribenzoate (m-H₃TATB), has been synthesized and structurally characterized. Compound 1 features 3D channels and cavities together, and exhibits high carbon dioxide sorption at normal pressure.

Prussian Blue mesocrystals prepared by a facile hydrothermal method
Ming Hu, Ji-Sen Jiang, Rui-Ping Ji and Yi Zeng,  CrystEngComm, 2009, 11, 2257
DOI: 10.1039/b911613n

Prussian Blue (PB) mesocrystals have been prepared by a facile hydrothermal method directly. PB nanoparticles aggregate together in an oriented way to form a hierarchical structure.

Catalytic growth of clusters of wurtzite ZnS nanorods through co-deposition of ZnS and Zn on Au film
Changqing Jin, Yingchun Cheng, Xin Zhang, Wei Zhong, Yu Deng, Chaktong Au, Xinglong Wu and Youwei Du,  CrystEngComm, 2009, 11, 2260
DOI: 10.1039/b904598h

This paper explains (i) the preparation of clusters of nanorods using ZnS + Zn as evaporation source and (ii) the preparation of an array of nanowires using only ZnS as evaporation source.

Easy synthesis and characterization of single-crystalline hexagonal prism-shaped hematite -Fe₂O₃ in aqueous media
Nitin Kaduba Chaudhari, Hyoung Chan Kim, Derac Son and Jong-Sung Yu,  CrystEngComm, 2009, 11, 2264
DOI: 10.1039/b910569g

A simple, mild and environment-friendly synthesis route is demonstrated for the first time to fabricate high yield crystalline uniform hexagonal prism-shaped weakly magnetic -Fe₂O₃ nanocrystals.

An enhanced fluorescence in a tunable face-to-face stacking assembly directed by the H-bonding
Xiao-Fei Fu, Yan-Feng Yue, Rui Guo, Le-Le Li, Wei Sun, Chen-Jie Fang, Chun-Hu Xu and Chun-Hua Yan,  CrystEngComm, 2009, 11, 2268
DOI: 10.1039/b910263a

A methanol-tunable solid state fluorescence enhancement was observed in a simple anthryl derivative 1-((anthracen-10-yl)methylene)-4-ethylthiosemicarbazide, mainly due to the formation of face-to-face stacking assembly directed and enhanced by intermolecular H-bonding interactions.

Zeolitic imidazole frameworks: structural and energetics trends compared with their zeolite analogues
Dewi W. Lewis, A. Rabdel Ruiz-Salvador, Ariel Gómez, L. Marleny Rodriguez-Albelo, François-Xavier Coudert, Ben Slater, Anthony K. Cheetham and Caroline Mellot-Draznieks,  CrystEngComm, 2009, 11, 2272
DOI: 10.1039/b912997a

Simulated crystal structure of the zeolitic imidazole framework (ZIF) with the topology of the LTL-type zeolite.

Construction of 3-fold interpenetrated pcu organic frameworks from methanetetrabenzoic acid with zigzag bipyridines
Yong-Biao Men, Junliang Sun, Zhi-Tang Huang and Qi-Yu Zheng,  CrystEngComm, 2009, 11, 2277
DOI: 10.1039/b911506d

Zigzag bipyridines induce crystalline assembly of the tetrahedral module methanetetrabenzoic acid to form the novel hydrogen-bonded organic framework with an unusual 3-fold interpenetrated pcu topology.

Adding the second dimension with cadmium: two-dimensional sheets assembled from cadmium(II) and 4-phenyl-4,2:6,4-terpyridine and locked by -stacked interactions
Edwin C. Constable, Guoqi Zhang, Catherine E. Housecroft, Markus Neuburger and Jennifer A. Zampese,  CrystEngComm, 2009, 11, 2279
DOI: 10.1039/b907918a

In [CdL₂(ONO₂)₂·MeOH·CHCl₃]_n (L = 4-phenyl-4,2:6,4-terpyridine), two-dimensional sheets are locked together by efficient -stacking between pendant phenyl substituents.

3D metal–organic frameworks incorporating water-soluble tetra-p-sulfonatocalix[4]arene
Wuping Liao, Ce Liu, Xiaofei Wang, Guangshan Zhu, Xiaojun Zhao and Hongjie Zhang,  CrystEngComm, 2009, 11, 2282
DOI: 10.1039/b908189e

3D porous MOFs with parallel 1D smaller circular hydrophilic channels and larger quadratic ones are constructed by coordination connecting of water-soluble tetra-p-sulfonatocalix[4]arene and lanthanide elements.

Facile fabrication of Cu(OH)₂ and CuO nanoribbon arrays by silver-mediated oxidation
Yunhua Liu, Jianfei Mao, Ping Jiang, Zemin Xu, HongyanYuan and Dan Xiao,  CrystEngComm, 2009, 11, 2285
DOI: 10.1039/b909514b

For the first time, the silver-mediated oxidation method has been used to facilely fabricate Cu(OH)₂ and CuO nanoribbon arrays on copper substrate at room temperature.

Unusual tubular organization with crystal stacks from a new cyclic thiophene compound,
Kun Lu, Yunqi Liu, Chong-an Di, Chunyan Du, Shanghui Ye, Ti Wu, Hongtao Liu, Xudong Xu and Gui Yu,  CrystEngComm, 2009, 11, 2288
DOI: 10.1039/b913254f

Self-assembled, large, free-standing organic tubular crystals with uniform size were fabricated by a simple solution process. A possible growth mechanism for such an interesting and unusual tube is proposed based on our experimental results.

Papers

Facile synthesis and shape evolution of highly symmetric 26-facet polyhedral microcrystals of Cu₂O
Weiwei Zhou, Bin Yan, Chuanwei Cheng, Chunxiao Cong, Hailong Hu, Hongjin Fan and Ting Yu,  CrystEngComm, 2009, 11, 2291
DOI: 10.1039/b912034n

A novel type of highly symmetric 26-facet polyhedral microcrystals of Cu2O with well-developed {100}, {110}, {111} crystallographic faces are successfully synthesized with systematic shape evolution in a properly selected reaction medium. Quite interestingly, these polyhedra exhibit a core-shell structure.

Supramolecular assemblies prepared from an iron(II) tripodal complex, tetrafluoroborate, and alkali metal cations. The effect of cation size on coordination number, anion disorder and hydrogen bonding
Luigi Alvarado, Cynthia Brewer, Greg Brewer, Ray J. Butcher, Alison Straka and Carol Viragh,  CrystEngComm, 2009, 11, 2297
DOI: 10.1039/b905061b

Reaction of a spin crossover iron(II) complex with MBF₄ results in the formation of low spin double salts. Octahedral (M = Na) and icosahedral geometries (M = K, Rb, Cs, and NH₄) are observed.

Growth and characterization of ZnS porous nanoribbon array constructed by connected nanocrystallities
Liang Shi, Keyan Bao, Jie Cao and Yitai Qian,  CrystEngComm, 2009, 11, 2308
DOI: 10.1039/b909599c

Well-aligned ZnS porous nanoribbon array has been prepared with a simple one-step solvothermal approach. X-Ray diffraction, energy dispersive X-ray spectrometry and scanning electron microscopy indicate the formation of ZnS nanoribbon array.

Synthesis and characterization of well-aligned anatase TiO₂ nanocrystals on fused silica via metal–organic vapor deposition
Chi-An Chen, Yi-Min Chen, Ying-Sheng Huang, Dah-Shyang Tsai, Kwong-Kau Tiong and Pei-Chen Liao,  CrystEngComm, 2009, 11, 2313
DOI: 10.1039/b909433d

The structural characterization of the well-aligned A–TiO₂ NCs revealed the formation of building units bonded along {112} facets with preferred (220) orientation.

Structural variability in uranyl–lanthanide heterometallic complexes with DOTA and oxalato ligands
Pierre Thuéry,  CrystEngComm, 2009, 11, 2319
DOI: 10.1039/b907392b

The four novel 4f–5f heterometallic complexes obtained with DOTA under hydrothermal conditions are either 2D or 3D frameworks with uranyl oxalate groups bridging the lanthanide–DOTA complex molecules (or 1D subunit in one case). The first example of a gadolinium–DOTA complex with an eight-coordinate twisted square antiprismatic geometry is given.

Highly crystalline niobium oxide converted from flux-grown K₄Nb₆O₁₇ crystals
SunHyung Lee, Katsuya Teshima, Yuki Niina, Sayaka Suzuki, Kunio Yubuta, Toetsu Shishido, Morinobu Endo and Shuji Oishi,  CrystEngComm, 2009, 11, 2326
DOI: 10.1039/b905870b

Highly crystalline Nb₂O₅ nanotubes were successfully fabricated by a two-step process—KCl flux growth of K₄Nb₆O₁₇ crystals and then intercalation–exfoliation process using a TBA⁺OH^- aqueous solution.

Selectivity by benzopinacol
Gaëlle Ramon, Ayesha Jacobs, Lungile Z. N. Masuku and Luigi R. Nassimbeni,  CrystEngComm, 2009, 11, 2332
DOI: 10.1039/b905248h

Three-ways competition experiments for benzopinacol.

Morphological control of vertically self-aligned nanosheets formed on magnesium alloy by surfactant-free hydrothermal synthesis
Takahiro Ishizaki, Sung-Pyo Cho and Naobumi Saito,  CrystEngComm, 2009, 11, 2338
DOI: 10.1039/b907490b

Morphologies of vertically self-aligned nanosheets were controlled on magnesium alloy by changing the treatment temperature of surfactant-free hydrothermal synthesis.

The conformational polymorphism and weak interactions in solid state structures of ten new monomeric and dimeric substituted dibenzyldimethylammonium chloridopalladate salts
Anssi Peuronen, Manu Lahtinen and Jussi Valkonen,  CrystEngComm, 2009, 11, 2344
DOI: 10.1039/b905421a

The significance of weak cation–cation interactions in crystalline diaryldialkylammonium chloridopalladates has been studied by X-ray crystallographic methods accompanied with computational methods.

MMH-2 as a new approach for the prediction of intermolecular interactions: the crystal packing of acetamide
Edelsys Codorniu-Hernández, A. Daniel Boese, Carsten Schauerte, Alberto Rolo-Naranjo, Ramón Miranda-Quintana, Luis A. Montero-Cabrera and Roland Boese,  CrystEngComm, 2009, 11, 2358
DOI: 10.1039/b905779j

MMH-2 is a novel approach for the prediction of intermolecular interactions with a broad range of applications and a contribution to crystal structure prediction. It is likely to become an important tool for crystal engineering.

2-Fold interpenetration via ligand-induced alternating perpendicular helical channel motifs. Structure of an acentric diamondoid silver(I) coordination polymer
Tae Hwan Noh, Youn Jung Choi, Yoon Kyong Ryu, Young-A Lee and Ok-Sang Jung,  CrystEngComm, 2009, 11, 2371
DOI: 10.1039/b905296h

The reaction of AgPF₆ with 1,3-dibromo-2,2-bis[(isonicotinoyloxy)methyl]propane affords a new 3D tetrahedral silver(I) coordination polymer topology consisting of interpenetration of alternating perpendicular right-handed and left-handed helical channel motifs.

Size and temperature dependent encapsulation of tetrahedral anions by a protonated cryptand host
Li-Zi Yang, Yu Li, Long Jiang, Xiao-Long Feng and Tong-Bu Lu,  CrystEngComm, 2009, 11, 2375
DOI: 10.1039/b904838c

The protonated cryptand L shows size and temperature dependent encapsulation for tetrahedral perchlorate and dihydrogen phosphate anions, respectively: at room temperature, the smaller ClO₄^- can be encapsulated inside the cavity of H₆L⁶⁺, while the larger H₂PO₄^- cannot be encapsulated inside the cavity of H₆L⁶⁺ and H₈L⁸⁺. Upon heating, however, H₂PO₄^- can be encapsulated into the cavity of H₈L⁸⁺.

Dipolar guest orientation in polymer co-crystals and macroscopic films
Oreste Tarallo, Vittorio Petraccone, Christophe Daniel and Gaetano Guerra,  CrystEngComm, 2009, 11, 2381
DOI: 10.1039/b904675p

Through the achievement of ac_// uniplanar orientation of the syndiotactic polystyrene clathrate phase with p-nitroaniline, macroscopic films with guest dipoles nearly perpendicular to the film surface can be obtained. This orientation is the most suitable for electrical poling processes, possibly leading to ferroelectric properties.

Predicting spontaneous racemate resolution using recent developments in crystal structure prediction
John Kendrick, Matthew D. Gourlay, Marcus A. Neumann and Frank J. J. Leusen,  CrystEngComm, 2009, 11, 2391
DOI: 10.1039/b909038j

A hybrid molecular mechanics and quantum mechanics solid state DFT method is used to calculate the lattice energies of four molecules in both racemic and enantiopure crystal structures and it successfully predicts those molecules that are observed to resolve spontaneously into pure enantiomers.

Trimorphism of a model carcinogen 4-nitroquinoline-N-oxide
Yakov P. Nizhnik, Jianjiang Lu, Sergiy V. Rosokha and Jay K. Kochi,  CrystEngComm, 2009, 11, 2400
DOI: 10.1039/b905845a

Variations of crystallization rate and/or solvent led to isolation of three polymorphs of a model carcinogen 4-nitroquinoline N-oxide showing distinct patterns of hydrogen bondings, -stacking and electrostatic interactions

Structural diversity in the reactions of 4-(pyridyl)-2,2:6,2-terpyridine ligands and bis{4-(4-pyridyl)-2,2:6,2-terpyridine}iron(II) with copper(II) salts
Jonathon E. Beves, Edwin C. Constable, Silvio Decurtins, Emma L. Dunphy, Catherine E. Housecroft, Tony D. Keene, Markus Neuburger, Silvia Schaffner and Jennifer A. Zampese,  CrystEngComm, 2009, 11, 2406
DOI: 10.1039/b909639f

Reactions of [Fe(1)₂]²⁺ (1 = 4-(4-pyridyl)-2,2:6,2-terpyridine) or 1 with Cu(II), and of 4-(3-pyridyl)- and 4-(2-pyridyl)-2,2:6,2-terpyridine with Cu(II) lead to mononuclear or polymeric complexes or a heterometallic oligomer.

Comparative analysis of M–O, M–S and cation–(arene) interactions in the alkali metal (Na⁺, K⁺, Rb⁺, Cs⁺) bis-dithiocarbamate salts of N,N-dibenzyl-1,2-ethylenediamine
Reyna Reyes-Martínez, Herbert Höpfl, Carolina Godoy-Alcántar, Felipe Medrano and Hugo Tlahuext,  CrystEngComm, 2009, 11, 2417
DOI: 10.1039/b907160a

In the alkali metal (Na⁺, K⁺, Rb⁺, Cs⁺) bis-dithiocarbamate salts of N,N-dibenzyl-1,2-ethylenediamine, there is a clear tendency for a decreasing number of M–O bonds in favor of M–S and cation–(arene) interactions, however only K⁺ forms a semi-sandwich type complex with ⁶-coordination.

Entangled metal–organic frameworks modulated by N-donor ligands of different conformations
Hua-Dong Guo, Dong-Fang Qiu, Xian-Min Guo, Guo-Li Zheng, Xiao Wang, Song Dang and Hong-Jie Zhang,  CrystEngComm, 2009, 11, 2425
DOI: 10.1039/b905190m

Based on the long-chain aromatic dicarboxylic acid and N-donor ligands with versatile conformations, four Zn(II) metal–organic frameworks with interesting entangled structures from interpenetrating to self-penetrating are presented.

Synthesis of phenyl substituted bisphosphonates and crystal structures and characterization of Cd complexes of (dichloromethylene)bisphosphonic acid phenyl and alkyl ester derivatives
Jonna Jokiniemi, Jouko Vepsäläinen, Harri Nätkinniemi, Sirpa Peräniemi and Markku Ahlgrén,  CrystEngComm, 2009, 11, 2431
DOI: 10.1039/b907874f

Phenyl esters of clodronic acid were synthesised, and three novel Cd(II) complexes of ester derivatives of clodronic acid with different layered structures were prepared and characterized in detail.

Crystal engineering of 5,5-bisdiazo-dipyrromethane with halogen synthons
Zhenming Yin, Wuyan Wang, Miao Du, Xiuguang Wang and Jianhua Guo,  CrystEngComm, 2009, 11, 2441
DOI: 10.1039/b905568a

The crystal structures of halogen substituted 5,5-bisdiazo-dipyrromethanes indicate the recurrence of quadruple N–HN hydrogen bonded interlock type dimers of 5,5-bisdiazo-dipyrromethanes and the critical role of halogen interactions in directing the supramolecular self-assemblies.

Rational design of cyanide-bridged heterometallic M(I)–Mn(II) (M = Ag, Au) one-dimensional chain complexes: synthesis, crystal structures and magnetic properties
Daopeng Zhang, Hailong Wang, Laijin Tian, Jianzhuang Jiang and Zhong-Hai Ni,  CrystEngComm, 2009, 11, 2447
DOI: 10.1039/b903174j

Two dicyanide-containing building blocks K[M(CN)₂] (M = Ag or Au) and two seven-coordinated macrocycle Mn(II) complexes have been employed to construct four cyanide-bridged complexes with predictable 1-D chain structure. Systematic magnetic studies reveal the weak antiferromagnetic interaction between the Mn(II) ions through [–NC–M–CN–] unit.

A new 3-D two-fold interpenetrated framework with sqp net based on Cu₆I₆ and Cu₈I₈ cluster nodes
Qin Hou, Jie-Hui Yu, Jia-Ning Xu, Qing-Feng Yang and Ji-Qing Xu,  CrystEngComm, 2009, 11, 2452
DOI: 10.1039/b902936m

Based on Cu₆I₆ and Cu₈I₈ clusters as 5-connected nodes, a new 3-D network [Cu₁₄I₁₄ (dabco)₅(py)] has been synthesized. This compound has a two-fold interpenetrated sqp topology and displays photoluminescence at room temperature.

The effect of alkyl chain length in a series of novel N-alkyl-3-benzylimidazolium iodide salts
Pamela M. Dean, Jacob J. Golding, Jennifer M. Pringle, Maria Forsyth, Brian W. Skelton, Allan H. White and Douglas R. MacFarlane,  CrystEngComm, 2009, 11, 2456
DOI: 10.1039/b906142h

The intermolecular interactions of a series of N-alkyl-3-benzylimidazolium iodide salts with a range of alkyl chain lengths are qualitatively investigated in order to obtain a comparative understanding of the effects of substitution on the salts thermal properties.

Biomimetic synthesis of monodisperse rosette-like calcite mesocrystals regulated by carboxymethyl cellulose and the proposed mechanism: An unconventional rhombohedra-stacking route
Wei Li and Peiyi Wu,  CrystEngComm, 2009, 11, 2466
DOI: 10.1039/b901580a

Rosette-like calcite spherules are synthesized in carboxymethyl cellulose solution, by stacking of rhombohedral subunits in partial superposition due to the electrostatic repulsive interactions between the polyanions adsorbed on the subunits.

Can crystal structure prediction guide experimentalists to a new polymorph of paracetamol?
Marcus Aurelius Neumann and Marc-Antoine Perrin,  CrystEngComm, 2009, 11, 2475
DOI: 10.1039/b909819d

An extensive in silico polymorph screen of paracetamol finds the known crystal forms I, II and III in the correct stability order and reveals a putative new form IV.

An in-depth study on hydrogen-bonded 3-D frameworks possessing hydrophobic layers and hydrophilic pillars
George E. Kostakis, Andreas Mavrandonakis, Ghulam Abbas, Wim Klopper, Detlef Schooss, Sergei Lebedkin, Yanhua Lan and Annie K. Powell,  CrystEngComm, 2009, 11, 2480
DOI: 10.1039/b907030c

Eight lanthanide compounds with hydrophobic and hydrophilic layers were synthesized. Thermal stability, reversible solvent uptake, photoluminescence and magnetic studies of these compounds were performed. The near-planar water pentamer in 1 was confirmed from calculations.

The first -Keggin core of molybdogermanate in extended architectures of nickel(II) with N-donor ligands: syntheses, crystal structures and magnetic properties
Wenju Wang, Lin Xu, Guanggang Gao, Li Liu and Xizheng Liu,  CrystEngComm, 2009, 11, 2488
DOI: 10.1039/b903793d

Two -Keggin type molybdogermanates represent the first example of -Keggin type molybdogermanate clusters employed as effective building blocks to construct extended frameworks.

One-pot synthesis of two new copper(I) coordination polymers: in situ formation of different ligands from 4-aminotriazole
Zhen-Guo Zhao, Rong-Min Yu, Xiao-Yuan Wu, Qi-Sheng Zhang, Yi-Ming Xie, Fei Wang, Seik Weng Ng and Can-Zhong Lu,  CrystEngComm, 2009, 11, 2494
DOI: 10.1039/b821491c

Two copper(I) triazolate coordination polymers with interesting structural topologies have been synthesized simultaneously in a one-pot reaction. Both compounds contain a Cu₄I₄ cluster but in different arrangements.

Synthesis, supramolecular structures and catalytic properties of nickel(II) 3-sulfobenzoate complexes with chelating amine ligands
Xiao-He Miao and Long-Guan Zhu,  CrystEngComm, 2009, 11, 2500
DOI: 10.1039/b907453h

Five new Ni^II/3-sb complexes with chelating ligands were synthesized. These complexes show diverse topologies and exhibit catalytic activity for the oxidation reaction of methyl phenyl sulfide.

Kinetic manipulation of the morphology evolution of FePO₄ microcrystals: from rugbies to porous microspheres
Shaozhen Wang, Qian Wang, Jun Liu, Zhiguo Cheng, Dajie Si and Baoyou Geng,  CrystEngComm, 2009, 11, 2510
DOI: 10.1039/b907979n

The morphology evolution of FePO₄ microstructures was performed through a kinetic process. The morphologies could be manipulated from rugby to microsphere through controlling the amount of H₃PO₄.

Construction of copper metal–organic systems based on paddlewheel SBU through altering the substituent positions of new flexible carboxylate ligands
Fangna Dai, Haiyan He, Dongliang Gao, Fei Ye, Xiaoliang Qiu and Daofeng Sun,  CrystEngComm, 2009, 11, 2516
DOI: 10.1039/b904671b

By applying three new types of flexible dicarboxylate ligands to assemble with paddlewheel SBUs, four metal–organic complexes have been synthesized and characterized. The effects of the positions of the functional substituents in the central benzene ring on the structures of the final product have been discussed.

Synthesis, crystal structure, and characterization of charge-transfer salt: (BEDT-TTF)₅[Fe(C₂O₄)₃]·(H₂O)₂·CH₂Cl₂ (BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene)
Bin Zhang, Yan Zhang, Fen Liu and Yanjun Guo,  CrystEngComm, 2009, 11, 2523
DOI: 10.1039/b910483f

The charge-transfer salt (BEDT-TTF)₅Fe(C₂O₄)₃(H₂O)₂CH₂Cl₂ obtained by electrocrystallization is different from (BEDT-TTF)₄AFe(C₂O₄)₃·solvent in composition and anion arrangement. The formal charges of BEDT-TTF are +0.5 and +1.0. It is a paramagnetic semiconductor.

Thermally stable helical chain and octanuclear Ag(I) coordination networks with yellow luminescence
Chunfeng Yan, Lian Chen, Rui Feng, Feilong Jiang and Maochun Hong,  CrystEngComm, 2009, 11, 2529
DOI: 10.1039/b909549g

Three Ag(I) complexes with 2,4,6-tri(2-pyridyl)-1,3,5-triazine (tpt) were synthesized under solvothermal or solvent evaporation conditions. Complexes 1 and 3 display unusual yellow luminescence in the crystal states at cryogenic temperature.

Polymorphism and versatile solvate formation of thiophanate-methyl
Elisa Nauha, Heidi Saxell, Maija Nissinen, Erkki Kolehmainen, Ansgar Schäfer and Rainer Schlecker,  CrystEngComm, 2009, 11, 2536
DOI: 10.1039/b905511h

Two polymorph and fourteen solvate structures are reported for the fungicide active thiophanate-methyl. The solvate structures especially demonstrate the potential of thiophanate-methyl as a versatile building block in crystal engineering.

Substituent effect on the assembly of coordination polymers containing isophthalic acid and its derivatives
Dong-Sheng Zhou, Fang-Kuo Wang, Shi-Yao Yang, Zhao-Xiong Xie and Rong-Bin Huang,  CrystEngComm, 2009, 11, 2548
DOI: 10.1039/b907142c

The substituents on the isophthalic acids influence the coordination environments of metal ions and the coordination modes of carboxyls, and determine the structures of the coordination polymers. The coordination behavior of metal ions also affects the structures.

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