The name ChemDraw has long been synonymous with the drawing of chemical structures, and CambridgeSoft has branched into additional tools for enhancing presentation and productivity. The current version of ChemDraw Ultra is a full-featured package for chemical communication with additional tools for bench and computational chemists in both industry and academia. This package is one of twelve "Suites" and three stand-alone products that include chemical structure drawing, according to the comparison chart on the CambridgeSoft Web site.The software reviewed is packaged as a Windows/Mac DVD. Although all of the ChemDraw-based drawing features are available on both platforms, the add-on applications bundled in this Suite, i.e., ChemBio3D Pro, ChemBioFinder Std., MNova Ste/Lte, and Excel integration, are only available for Windows. Installation of ChemDraw Ultra was straightforward on both Mac OS X and Windows XP. Installation on two partitions of a single computer, along with an additional copy on a laptop or home computer, is permissible with the license.In contrast to the editing issues encountered previously when using ChemDraw with a Mac OS, ChemDraw 12 structures pasted into MS Office 2011 documents can be returned to ChemDraw for further editing. Structures saved in MS Office 2004 files (but not in MS Office 2008) can also be edited in ChemDraw 12. However, Mac/MS Office integration has not yet reached the ease of the Windows versions; in Windows, a ChemDraw structure pasted into an MS Word, PowerPoint, or Excel document can be chosen and modified in ChemDraw, and the edits will be transferred automatically in the embedding MS Office document.The user interface and drawing features in ChemDraw 12 are the same in the Mac and Windows versions and continue to set the standard for function and usability. Incremental improvements in features include tools for drawing and maintaining disulfide bonds as well as other biomolecules, saving as scalable vector graphics (to avoid the "pixelation" in structures that are expanded, for example), and better support for polycyclic structures when using the "structures to names" feature. It is also easier to rotate structures and manipulate arrows than in previous versions of the product. Drawing curves has been significantly improved with the new "draw curve" tool.ChemDraw Ultra 12 is integrated with CambridgeSoft's subscription online databases; one year of access to the databases is provided with this product. When the ChemBioFinder hotlink window is activated for a highlighted structure, data from databases, including the Merck Index and the Encyclopedia of Reagents for Organic Synthesis, are retrieved and commercial sources for the substance are identified.A number of tools in ChemDraw are intended to help experimental chemists be more productive. For example, a

Hydrogen (H2) is one of the best candidates to replace current petroleum energy resources due to its rich abundance and clean combustion. However, the storage of H2 presents a major challenge. There are two methods for storing H2 fuel, chemical and physical, both of which have some advantages and disadvantages. In physical storage, highly porous organic polymers are of particular interest, since they are low cost, easy to scale up, metal-free, and environmentally friendly. In this review, highly porous polymers for H2 fuel storage are examined from five perspectives: (a) brief comparison of H2 storage in highly porous polymers and other storage media; (b) theoretical considerations of the physical storage of H2 molecules in porous polymers; (c) H2 storage in different classes of highly porous organic polymers; (d) characterization of microporosity in these polymers; and (e) future developments for highly porous organic polymers for H2 fuel storage. These topics will provide an introductory overview of highly porous organic polymers in H2 fuel storage.

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Recent advances provide new opportunities in the field of polymer piezoelectric materials. Piezoelectric materials provide unique insights to the fundamental understanding of the solid state. In addition, piezoelectric materials have a wide range of applications, representing billions of dollars of commercial applications. However, inorganic piezoelectric materials have limitations that polymer ferroelectric materials can overcome, if certain challenges can be addressed. This mini-review is a practical summary of the current research and future directions in the investigation and application of piezoelectric materials with an emphasis on polymeric piezoelectric materials. We will assume that the reader is well versed in the subject of polymers, but not as familiar with piezoelectric materials.

A study of the two-dimensional crystallization of rhodizonic acid on the crystalline surfaces of gold and copper is presented. Rhodizonic acid, a cyclic oxocarbon related to the ferroelectric croconic acid and the antiferroelectric squaric acid, has not been synthesized in bulk crystalline form yet. Capitalizing on surface-assisted molecular selfassembly, a two-dimensional analogue to the well-known solution-based coordination chemistry, two-dimensional structures of rhodizonic acid were stabilized under ultrahigh vacuum on Au(111) and Cu(111) surfaces. Scanning tunneling microscopy, coupled with first-principles calculations, reveals that on the less reactive Au surface, extended twodimensional islands of rhodizonic acid are formed, in which the molecules interact via hydrogen bonding and dispersion forces. However, the rhodizonic acid deprotonates into rhodizonate on Cu substrates upon annealing, forming magic clusters and metal−organic coordination networks with substrate adatoms. The networks show a 2:1 distribution of rhodizonate coordinated with 3 and 6 Cu atoms, respectively. The stabilization of crystalline structures of rhodizonic acid, structures not reported before, and their transition into metal−organic networks demonstrate the potential of surface chemistry to synthesize new and potential useful organic nanomaterials.