Vapochromic Behaviour

Optically active polymers play a very important role in our modem society. The specialities of optically active polymers are known with their various characteristics as occurred naturally in mimicry. The present review describes the monomers and synthesis of optically active polymers from its helicity, internal compounds nature, dendronization, copolymerization, side chromophoric groups, chiral, metal complex and stereo-specific behaviour. The various properties like nonlinear optical properties of azo-polymers, thermal analysis, chiroptical properties, vapochromic behaviour, absorption and emission properties, thermosensitivity, chiral separation, fabrication and photochromic property are explained in detail. This review is expected to be interesting and useful to the researchers and industry personnel who are actively engaged in research on optically active polymers for versatile applications. 

Since the early example of Balch et al. [92] of solvent-induced luminescence of a trigold(I) complex, attributed to the presence of columnar Au -Au interactions, other examples have been proposed as efficient VOC detectors based on extended metal-metal contacts involving Au(I), as well as other metal ions. For example, Fernandez et al. described the vapochromic and vapoluminescent behaviour of [T1 [Au(C6Cl5)2] (lOd, Fig. 10), which exhibits a 3D network of Au-Tl interactions... 

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