Author Archive

We can’t predict snow but can we predict melting points?

Computational inorganic chemistry has been providing significant insight into understanding chemical interactions and properties for some time now and the fruits of this labour are likely to become more in-depth and frequent as technologies advance. Simon Grabowsky et al. have been investigating the crystal packing in a series of naphthodioxanes which they systematically modified to possess larger R-groups and characterised the crystal structures of the materials at 100K.

The team also performed Hirshfeld surface analysis (a definition of molecular boundaries and intermolecular interactions) on their series of compounds and were able to correlate the surface analysis information with the crystal melting points. The team used molecules that don’t contain the traditional H-bond donor functional groups such as N-H and O-H so they were able to distinguish between the effects of different types of weaker interactions.

You can read the full details of this insightful investigation by accessing the full paper which is free for 4 weeks.

The Dalton Transactions themed issue ‘Computational chemistry of inorganic systems’ might also be of interest!

Crystal packing in the 2-R,4-oxo-[1,3-a/b]-naphthodioxanes – Hirshfeld surface analysis and melting point correlation
Simon Grabowsky, Pamela M. Dean, Brian W. Skelton, Alexandre N. Sobolev, Mark A. Spackman and Allan H. White
CrystEngComm, 2012, Advance Article
DOI: 10.1039/C2CE06393J

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November Crystal Clear: Novel Nano Networks and Necklaces

This months crystal clear brings us an eerie looking scene that looks more like something out of ‘Doctor Who’ than CrystEngComm.

These remarkable structures are in fact BaZrO3 nanotubes,  prepared by electrospinning a metal–organic precursor solution and calcining.

Albert Calleja and co-workers detail the synthesis of these nanoparticle chains in their article High temperature transformation of electrospun BaZrO3 nanotubes into nanoparticle chains, which is free to access for 4 weeks.

Electrospinning is an interesting technique which shows potential in a range of fields from electronics to smart textiles.  By combining this technique with a chemical precursor for their functional oxide (BaZrO3) and annealing the fibres they made, the team observed the crystalline nanostructure depicted here (which you’ll see more clearly in the full paper). Some of them look remarkably like Nano-Necklaces! 

Make sure you don’t miss a Crystal Clear by liking us on Facebook or following us on Twitter, we’ll also keep you updated on all Crystal Engineering News, from HOT articles to interviews (such as our interview earlier this month with Dan Shechtman)

High temperature transformation of electrospun BaZrO3 nanotubes into nanoparticle chains
Albert Calleja, Xavier Granados, Susagna Ricart, Judith Oró, Jordi Arbiol, Narcís Mestres, Ana Esther Carrillo, Xavier Palmer, Francesc Cano, Jose Antonio Tornero, Teresa Puig and Xavier Obradors
CrystEngComm, 2011, 13, 7224-7230
DOI: 10.1039/C1CE05108C

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HOT Article: Interpenetrating Diamondoid Networks

This HOT CrystEngComm paper by Jhy-Der Chen and colleagues reports the synthesis, structures and thermal properties of three novel interpenetrating coordination networks from mixed ligands. The team found that two of the synthesised products displayed 3D interpenetrating 8- and 9-fold distorted diamondoid networks, the latter being the maximum number of interpenetrations presently known for mixed ligand coordination networks! The team also found some interesting results when increasing the number of the backbone carbon atoms of the neutral spacer ligand……….

Read the full paper for free until 13th of December here

Discover other exciting developments by checking out the CrystEngComm most read articles

Highly interpenetrated diamondoid nets of Zn(II) and Cd(II) coordination networks from mixed ligands
Jian-Jr Cheng, Ya-Ting Chang, Chia-Jun Wu, Yi-Fen Hsu, Chia-Her Lin, Davide M. Proserpio
and Jhy-Der Chen

CrystEngComm, 2012, Advance Article DOI: 10.1039/C1CE06019H

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Predicting Perovskite

The 2H-perovskite related oxides are an interesting variant of the ABO3 perovskite structure family, however understanding which cation ratios produce which products isn’t always a straightforward task. Hans-Conrad zur Loye and team have compiled an extensive review of this remarkable structure family, compiling a database of recently synthesised compositions that have different cation ratios. By looking at the compositions and structures of these compounds the team have developed a simple method to predict new compositions, an indispensible tool for the synthetic chemist!

Read the full Highlight in CrystEngComm for free.

2H-perovskite related oxides: Synthesis, structures, and predictions
Hans-Conrad zur Loye, Qingbiao Zhao, Daniel E. Bugaris and W. Michael Chance
CrystEngComm, 2011, Highlight, DOI: 10.1039/c1ce05788j

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