Optical Properties of Perfluoroalkylated Poly(diphenylacetylene)

Abstract

Optical properties of a soluble conducting polymer, perfluoroalkylated poly(diphenylacetylene) (PFPDPA) were clarified. The band-gap energy was evaluated to be about 2.7 eV. Relatively strong fluorescence was observed in PFPDPA, while poly(diphenylacetylene) (PDPA) is considered to be a conducting polymer with a degenerated ground state in which a soliton is considered to play an important role. A light-emitting diode (LED) with In-Mg/PFPDPA/indium-tin-oxide (ITO) configuration was fabricated and green light emission was observed.

Precise synthesis of monosubstituted polyacetylenes using Rh complex catalysts. Control of solid structure and π-conjugation length

“…This suggests that a longer wave length shift in the UV spectra of the para-substituted aromatic acetylenes is created when an alkoxy side-chain bearing a longer alkyl chain is introduced at the para-position in the aromatic ring of the relevant polyacetylene. It should also be noted that due to the extremely long conjugated trans sequences necessary for nonlinear materials, an especially large v (3) value, i. e., the third harmonic generation (THG) coefficient 5,6,48) , can easily be generated by such compressions without heat treatment, while side reactions are minimized in this process. Fig.…”

“…Scientific interest in monosubstituted polyacetylenes, e. g., poly(ethynylbenzene), as p-conjugated polymers has been rapidly growing for many years and recently focused on the many interesting physicochemical characteristics and novel properties, in particular on conductivity 1) , ferromagnetism 2) , oxygen permeability 3) , humidity sensor 4) , non linear optical (NLO) materials 5) , electroluminescence (EL) materials 6) , and so on. Preparation of the poly(ethynylbenzene) (PEB) has been achieved by various types of catalysts, e. g., Luttinger catalyst, Co(NO 2 ) 2 1NaBH 4 7) , Wilkinson catalyst, RhCl(PPh 3 ) 3 8) , Pt or Ni complex catalysts [9][10] , and metathesis catalysts, e. g., WCl 6 11) .…”

Side-Chain-Functionalized Polyacetylenes, 1. Liquid Crystalline and Stereomutational Properties

“…[6] The type of (co)catalyst that is used to prepare this class of polymers has a strong influence on the regioregularity of the backbone. [7] Liquid-crystalline polyacetylenes have been synthesized with mesogenic side chains, such as cyanobiphenyl, cholesteryl, and phenylbenzoate units, [8] and in many cases a smectic-A-type mesophase is observed.…”

Synthesis, Characterization, Electrical Conductivity and Fluorescence Properties of Polyimine Bearing Phenylacetylene Units

“…Scientific interest in monosubstituted polyacetylenes, the first synthesized conducting polymers, e.g., poly(ethynylbenzene), as π-conjugated polymers have been rapidly growing for many years and recently focused on the many interesting physicochemical characteristics and novel properties, in particular on conductivity [1,2], ferromagnetism [3], oxygen permeability [4,5], humidity sensor [6,7], nonlinear optical (NLO) materials [8,9], electroluminescence (EL) materials [10], and so on. Taking this into consideration, imine polymers synthesized in the presence of phenyl acetylene group was targeted to increase the conductivity [11,12].…”