Coordination polymers, porous

Grinding conditions are modified by the nature of supports. Gold clusters with a diameter of 1.5 nm were obtained on an aluminum-containing porous coordination polymer by grinding in an agate mortar in air for 20 min, followed by the reduction in a stream of H2 in N2 at 120°C for 2 h ]50]. In contrast, ball milling is favorable... 

T. K. Maji and S. Kitagawa 2155 Chemistry of porous coordination polymers... 

Kitagawa S, Kitaura R, Noro S. Functional porous coordination polymers. Angew Chem Int Ed 2004 43 2334-2375. 

In conclusion, ID coordination polymer [Zn(tmbdc)(dmso)2]-2(DMSO) 2 has been synthesized with 2,3,5,6-tetramethyl-l,4-benzenedicarboxylic acid in DMSO. The structure contains ID chains formed by octahedraly coordinated Zn ions chelated by the carboxyl groups of tmbdc, rather than the 2D (4,4) nets constructed from paddle-wheel SBU of pairs Zn ions as found in [Zn2(bdc)2(dmso)2]-5DMSO 1. Analysis of the structure reveals that the steric hindrance of die four methyl groups of tmbdc determines the coordination environments of the zinc ions and the coordination modes of the carboxyls, and thus the final structures of the coordination polymers. The result also shows that DMSO is a stronger ancillary ligand and is also easier to be included in the structures of coordination polymers, compared to DMF. DMSO can be a better solvent for the syntheses of porous coordination polymers. 

Approaches to the formation of three new types of micro-porous materials that complement zeolites will be discussed. In each case, whether metal coordination polymers, metal-linked ceramic oxide clusters, or new hybrids containing both coordination and ceramic components, engineering of the Secondary Building Unit (SBU) is of critical importance. Successful examples of these approaches include the first thermally stable 3-D micro-porous coordination polymer with chemical functionalizability [Cu3(TMA)2(H20)3] , as well as a 3-D micro-porous cluster based material [V,2B18O60H8(Cd(en)(H2O) 3]". ... 

Figure 4. Structure of [Cu3(TMA)2(H20)3]n -A Chemically Functionalizable Micro-porous Coordination Polymer...

Zeolite networks are the most significant topologies for porous materials, and are extremely scarce in porous coordination polymers. Three new zeolite-type porous coordination polymers, [Zn(mim)2] 2H20 , [Zn(eim)2] 2H20 , and... 

Fig. 6 Porous coordination polymer (PCP) developed by Kitagawa and coworkers. The pores, which extend throughout the array, can be filled by C02 molecules (grey and red), allowing these materials to employ their high internal surface area as gas adsorbents [13]. Reprinted with permission...

The current focus on highly porous materials has led to a great deal of activity in this field. Kitagawa and coworkers developed what they called porous coordination polymers that were rigid enough to survive loss of the encapsulated solvent from... 

Functional porous coordination polymers with heterocycles as ligands 04AG(E)2334. 

TMA can coordinate to not only Cu2+ to form the typical 3-D framework polymer but also to Co2+ to form a porous host-guest compound Co(TMA) (py) with a different structure. The guest pyridine molecules in this compound may be removed from the channels without the collapse of the framework, and the pyridine-removed porous material adsorbs other guest molecules.[187] Polymerization of TMA with a Ni2+ macro-cyclic complex leads to a porous coordination polymer with a unique structure. In the... 

Through mixing of an N-containing ligand and an O-containing one in the same reaction system, porous coordination polymers with two or more ligands may be... 

Through coordination of O-bridged trinuclear Zn2+ clusters with chiral ligands, chiral porous coordination polymers may be obtained.[207] Because the two enantiomers of the ligand may be isolated separately, the obtained porous coordination polymers may also be present as the separate enantiomers. The guest water molecules in the polymer channels may be reversibly adsorbed and desorbed, and this lays the foundation for these... 

R. Kitaura, K. Seki, G. Akiyama, and S. Kitagawa, Porous Coordination-polymer Crystals with Gated Channels Specific for Supercritical Gases. Angew. Chem., Int. Ed., 2003, 42, 428-431. 

Kitagawa, S., Kitaura, R., and Noro, S. 2004. Functional porous coordination polymers. Angewandte Chemie International Edition 43, 2334-2375. 

Jee B, Eisinger K, Gul-E-Noor F et al (2010) Continuous wave and pulsed electron spin resonance spectroscopy of paramagnetic framework cupric ion in the Zn(Il) doped porous coordination polymer Cu3 xZnx(btc)2. J Phys Chem C 114 16630-16639... 

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