Title
Carbazolevinylene and phenylenevinylene polymers by ring-opening metathesis polymerization and their characterization, nanoaggregates and optical and electrochemical properties
Author
Ching-Ju Liu, Chao-Chi Wang, Dong-Lin Kuo, Chin-Yang Yu
Year
2019
Journal
Polymer
Abstract
Homopolymers and random and block copolymers containing carbazolevinylenes and phenylenevinylenes were synthesized by ring-opening metathesis polymerization of the ring-strained monomers such as carbazolephanedienes and cyclophanedienes in the presence of the third generation Grubbs’ initiator. The different molar ratios of the individual blocks were prepared by simply altering the monomer to initiator ratio. The polydispersity index of the block copolymers was relatively low and was in a range of 1.25–1.35. The absorption band of the copolymers with three different ratios of the individual block mainly exhibited a combination of the absorption band of the two individual homopolymers. The energy transfer of the block polymers from carbazolevinylenes to phenylenevinylenes is more effective in solid state than in solution. The emission color of the block copolymer solution can be changed from blue to yellow depending on the volume ratio of the mixture of THF and methanol. The carbazolevinylene and phenylenevinylene block polymers with a molar ratio of 40:51 exhibited unique network-like aggregates containing several spherical nanoparticles with the average diameter of 38 nm.
Instrument
V-670, FP-8500
Keywords
Absorption, Photoluminescence, Fluorescence, Band gap, Quantum yield, Chemical stability, Solid state, Optical properties, Polymers, Materials