Targeted classification of metal-organic frameworks in the Cambridge structural database (CSD).

Large-scale targeted exploration of metal-organic frameworks (MOFs) with characteristics such as specific surface chemistry or metal-cluster family has not been investigated so far. These definitions are particularly important because they can define the way MOFs interact with specific molecules ( their hydrophilic/phobic character) or their physicochemical stability. We report here the development of algorithms to break down the overarching family of MOFs into a number of subgroups according to some of their key chemical and physical features.

New insights and innovation from a million crystal structures in the Cambridge Structural Database.

The Cambridge Structural Database (CSD) is the world's largest and most comprehensive collection of organic, organometallic, and metal-organic crystal structure information. Analyses using the data have wide impact across the chemical sciences in allowing understanding of structural preferences. In this short review, we illustrate the more common methods by which CSD data influence molecular design.

Iron arsenate frameworks.

Six new iron arsenate framework structures, Fe(2)As(2)O(7) x 2H(2)O, [Fe(6)As(8)O(32)H(4)](2-)(1,4-butanediamininium(2+)) x 2H(2)O, [Fe(4)As(6)O(22)H(2)](2-)(piperazinium(2+)), [Fe(5)As(5)O(24)H(4)](2-)(piperazinium(2+)) x 2H(2)O, [Fe(6)As(7)O(31)H(5)](2-)(dabco(2+)) and LiFeAsO(4)OH have been synthesised under hydrothermal conditions. Incorporation of the amine cation templates leads to more open framework geometries and, in contrast to iron phosphates which have topologies based on PO(4) tetrahedra, the iron arsenate structures typically contain protonated As(O,OH)(4) units. The magnetic properties of the iron arsenates studied show Curie-Weiss behaviours with maxima in the chi(T) vs.

A chiral, 16-ring channel framework and a layered caesium zincoarsenate.

Caesium zinc arsenate frameworks with a large, chiral pore and an expansive interlayer region have been synthesised.

Boroarsenates: a framework motif and family templated on cations and anions.

Molten salt reactions of NH4H2AsO4, H3BO3, and MX (M = Li, Na, K, Rb Cs, NH4 and X = F, Cl, Br) yield numerous new alkali metal and alkali metal salt templated three-dimensional boroarsenate and fluoroboroarsenate frameworks. The structures of these materials are formed from BO4 (BO3F) and As(O,OH)4 tetrahedra defining channels and interlayer regions containing either simple alkali metal cations or both cations and halide anions. These boroarsenate-based frameworks are unusual in comparison with other oxotetrahedral-based materials in that terminal OH, on As, may be present, decorating the inner surfaces of the channels, as in the 12-membered rings of K2[B(AsO3O)2H].

A system for approving, monitoring, and recording CME activities in a university hospital setting.

The increased demand that mandatory continuing education requirements place on an academic physician's time and the conviction that continued learning is best when that learning is related to patient care were the impetus for developing a continuing education system in the University of Michigan Hospital for medical faculty and medical staff. Using the capability to co-sponsor continuing medical education, the University of Michigan Medical School established a quality assessment mechanism that enabled approval of a variety of ongoing instructional activities in the hospital setting for continuing education credit.