Preparation of polymers containing

Molecular imprinting has recently attracted considerable attention as an approach to the preparation of polymers containing recognition sites with predetermined selectivity. The history and specifics of the imprinting technique pioneered by Wulff in the 1970s have been detailed in several excellent review articles [122-124]. Imprinted monoliths have also received attention as stationary phases for capillary electrochromatography. 

With respect to the polymeric backbone, two approaches exist for the preparation of functional polymers, the polymerization or copolymerization of monomers which carry the desired functionality, and secondly the chemical modification of preformed polymers. The former concept, the polymerization of prefunctionalized monomers, was often tested in the early days of polymer-assisted syntheses, e. g. in the preparation of polymers containing pyridine [12] or quinone [13] residues, and benzaldehyde [14] or phosphine [15] functionalities. Although the latter approach demands that the synthetic organic chemist acquires profound knowledge of polymers and polymerization, this strategy can have advantages because... 

Preparation of polymers containing urethane and semicarbazide groups [91]. 

Two other methods should be considered for the preparation of optically active polymers the first one consists in the preparation of polymers containing functional groups, which are reacted with optically active low molecular weight compounds (Scheme 3) the second is based on the possible asymmetric induction by asymmetric groups introduced in the monomers that are cleaved after the polymerization (Scheme 4). 

Another method for the preparation of polymers containing pyrazoline fragments was suggested in [18]. Poly (9i/-fluoren-2,7-ylene)- / -[3,5-bis(l,4-phenylene)-4,5-dihydro-1-phenylpyrazole] 53 was synthesized by the reaction of pyrazoline 51 and fluorene-2,7-bis(trimethylene boronate) 52 in toluene in the presence of a catalyst, Pd(PPh3)4, with 85% yield. 

Bunz and co-workers reported the preparation of polymers containing cyclopentadienyl-cobalt moieties coordinated to cyclobutadiene rings, using diethylnyl and dipropynyl cyclobu-... 

In general, modification or after treatment of a given silicon containing polymer with an appropriate boron compound is a widely used method for the preparation of polymers containing silicon and boron. Already in 1984, Takamizawa et al. reported on the reaction of polydimethylsilane with B-trimethyl-N -triphenylborazine. Thermal treatment of a mixture of these educts results in decomposition and polycondensation reactions yielding an organoborosilicon polymer [65, 66]. 

An alternative route for the preparation of polymers containing arylamine side-chains is the construction of polymers from monomers that have triarylamine moieties pendant to... 

In another paper, Wang et ai, also reported preparation of polymers containing pendant propargyl groups that can also be effectively crosslink upon UV irradiation in the presence of a small amounts of W(CO)6. The polymer, like the ones above, crosslinking is a result of conversion of the acetylenic units to polyene and diacetylene moieties in the crosslinked system. 

Various types of polymerization reactions involving appropriate inorganic acyclic monomers have been quite effectively utilized for the preparation of polymers containing inorganic elements or inorganic groups. Some of... 

Interestingly, the condensation methodology allo-ws the preparation of polymers containing two different types of metal centers. Thus, polymers containing rhodium and palladium have been prepared by the synthetic methodology shown in Fig. 8.43 [3]. 

Scheme 9.11 Preparation of polymers containing Meldrum s acid by (a) ROMP of a NBE derivate by Hawker et al. [45], (b) block copolymers from NBE dicarboxyimide and 1,6-hexadiyne containing Meldrum s acid by...

The preparation of polymers containing pendant or terminal amino acids, peptides, and polypeptides has in the past been limited to organic polymers, and so has neglected inorganic polymers such as siloxanes. A novel series of amino acid functional siloxanes, suitable for use in personal care products, have been prepared and characterized for the first time. Such products can be synthesized by a three-step procedure. The preparation of amino acid siloxanes has now been achieved by hydrosilylation of an unsaturated functional amino acid with three hydrido functional siloxanes tetramethyldisiloxane, containing terminal Si-H groups, poly(methylhydrogen)siloxane (DP = 33) and... 

The synthesis of polymers with pendant arylamines has also been accomplished using palladium chemistry. For example, reaction of poly(4-bromostyrene) with a diarylamine containing a pendant azobenzene occurred to give the modified polymer in good yield. An alternative route for the preparation of polymers containing arylamine side-chains is the construction of polymers from monomers that have triarylamine moieties pendant to... 

Ohshita J, Arase H, Sumida T, Mimura N, Yoshimoto K, Tada Y, Kunugi Y, Harima Y, Kunai A (2005) Preparation of polymers containing Fe(0)-coordinated 2,5-diethynylsilole... 

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