Can I read Control of Molecular Aggregation in Symmetrically Substituted π‐Conjugated Bulky Poly( P ‐Phenylenevinylene)s and Their Copolymers on EtoBox?

Control of Molecular Aggregation in Symmetrically Substituted π‐Conjugated Bulky Poly( P ‐Phenylenevinylene)s and Their Copolymers by R. Resmi; S. R. Amrutha; M. Jayakannan is a Materials Science article available to read on EtoBox.

What is Control of Molecular Aggregation in Symmetrically Substituted π‐Conjugated Bulky Poly( P ‐Phenylenevinylene)s and Their Copolymers about?

## Abstract A new series of symmetrically substituted bulky PPV‐copolymers based on poly(bis‐2,5‐(2‐ethylhexyloxy)‐1,4‐phenylenevinylene) (**BEH‐PPV**) bearing tricyclodecane (TCD) pendants were synthesized to study the effect of chain aggregation in the π‐conjugated polymer backbone. The composition of the copolymers was varied up to 100 mol % and the structures of the copolymer were confirmed by NMR and FTIR. The molecular weights of the copolymers were obtained as __M__~w~ = 11,500–1,78,800 depending on the TCD‐incorporation in BEH‐PPV. The origin of the π‐aggregation was investigated using mixture of solvents (polar or nonpolar) or temperature as external stimuli. Absorption, photoluminescence, and time‐resolved fluorescence decay techniques were employed as tools to trace molecular aggregation in solution and solid state. The TCD‐substituted bulky copolymers showed almost twice the enhancement in photoluminescence compared with that of **BEH‐PPV**. Solvent‐induced aggregation studies of copolymers revealed the existence of strong molecular aggregation in **BEH‐PPV** compared with that of bulky copolymers. Variable temperature studies further evidence for the reversibility of m

Who reads Control of Molecular Aggregation in Symmetrically Substituted π‐Conjugated Bulky Poly( P ‐Phenylenevinylene)s and Their Copolymers?

Author

R. Resmi; S. R. Amrutha; M. Jayakannan

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)