Effect of conjugation pathway on electronic structures in p-π* conjugated polymers with fused borepin units

2021 ◽  
Author(s):  
Yohei Adachi ◽  
Fuka Arai ◽  
Mitsuru Sakabe ◽  
Joji Ohshita
Keyword(s):  
Conjugated Polymers ◽  
Electronic Structures ◽  
Orbital Interaction ◽  
Conjugated Materials

Among conjugated materials, the p-π* conjugated polymers have attracted much attention due to their unique electronic structures derived from the orbital interaction between the empty p-orbital on boron and the...

scholarly journals Architectures and Applications of BODIPY-Based Conjugated Polymers

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 75
Author(s):  
Yiqi Fan ◽  
Jinjin Zhang ◽  
Zhouyi Hong ◽  
Huayu Qiu ◽  
Yang Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Chemical Doping ◽  
Structure Property ◽  
High Quantum Yield ◽  
Conjugated Materials ◽  
Energy Band Gap ◽  
Photoelectric Properties ◽  
Structure Property Relationship ◽  
Insight Into ◽  
High Absorption

Conjugated polymers generally contain conjugated backbone structures with benzene, heterocycle, double bond, or triple bond, so that they have properties similar to semiconductors and even conductors. Their energy band gap is very small and can be adjusted via chemical doping, allowing for excellent photoelectric properties. To obtain prominent conjugated materials, numerous well-designed polymer backbones have been reported, such as polyphenylenevinylene, polyphenylene acetylene, polycarbazole, and polyfluorene. 4,4′-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based conjugated polymers have also been prepared owing to its conjugated structure and intriguing optical properties, including high absorption coefficients, excellent thermal/photochemical stability, and high quantum yield. Most importantly, the properties of BODIPYs can be easily tuned by chemical modification on the dipyrromethene core, which endows the conjugated polymers with multiple functionalities. In this paper, BODIPY-based conjugated polymers are reviewed, focusing on their structures and applications. The forms of BODIPY-based conjugated polymers include linear, coiled, and porous structures, and their structure–property relationship is explored. Also, typical applications in optoelectronic materials, sensors, gas/energy storage, biotherapy, and bioimaging are presented and discussed in detail. Finally, the review provides an insight into the challenges in the development of BODIPY-based conjugated polymers.

Molecular orbitals from group orbitals. I. A perturbational molecular orbital treatment of the electronic structures, shapes and conformations of AHmBHn Systems

1976 ◽  
Vol 54 (6) ◽  
pp. 949-962 ◽  
Author(s):  
Myung-Hwan Whangbo ◽  
Saul Wolfe
Keyword(s):  
Molecular Orbital ◽  
Electronic Structures ◽  
Molecular Orbitals ◽  
Orbital Interaction ◽  
Molecular Systems ◽  
Group Orbitals

A procedure is proposed which allows the group orbitals of a fragment AHm—to be obtained from the molecular orbitals of the molecule AHm—H. Orbital interaction diagrams constructed from these group orbitals have been found useful in the description of the electronic structures and conformations of a variety of molecular systems of the type AHmBHn. The molecules that have been treated by this procedure include ethane, hydrazine, diphosphine, aminophosphine, aminoborane, and sulfonium and phosphonium ylids.

Color tuning of alternating conjugated polymers composed of pentaazaphenalene by modulating their unique electronic structures involving isolated-LUMOs

2016 ◽  
Vol 7 (22) ◽  
pp. 3674-3680 ◽  
Author(s):  
Hiroyuki Watanabe ◽  
Masataka Hirose ◽  
Kazuyoshi Tanaka ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Conjugated Polymers ◽  
Electronic Structures ◽  
Polymer Solutions ◽  
Color Tuning ◽  
Conjugated Systems

Pentaazaphenalene-containing polymers with unique conjugated systems were synthesized. Various colors can be observed from the polymer solutions.

EXCITONS ON A 1D PERIODIC CONJUGATED POLYMER CHAIN: TWO ELECTRONIC STRUCTURES OF POLYDIACETYLENE CHAINS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3593-3596 ◽  
Author(s):  
C. LAPERSONNE-MEYER
Keyword(s):  
Quantum Yield ◽  
Conjugated Polymers ◽  
Electronic Structures ◽  
Conjugated Polymer ◽  
Radiative Lifetime ◽  
Exciton State ◽  
Fluorescence Yield ◽  
Radiative Processes ◽  
Exciton Lifetime ◽  
Fluorescent Quantum Yield

Crystalline polydiacetylenes (PDA) provide a model system for conjugated polymers. Monomer crystals where the polymer content is very low give access to the electronic structure of a 1D straight periodic isolated chain. PDA are known to exist as crystals in two electronic structures, the so-called 'blue' and 'red' phases. In 3BCMU crystals, blue and red chains coexist, so that the electronic properties of both types of chains in the same environment can be compared. In both cases fluorescence originates from the 1 B u exciton state. The blue exciton lifetime is 140 fs, its fluorescence quantum yield is small (10-4) and the relaxation is dominated by non radiative processes via low lying A g states as in polyenes. On the contrary, for red chains the exciton state is highly fluorescent (quantum yield 0.30), its lifetime is 52 ps at 15 K, implying a short radiative lifetime <100 ps. Recent results on the temperature dependence of lifetime and fluorescence yield imply the presence of states, thermally accessible from the exciton state, but non radiant to the ground state. This is consistent with a non planar conformation of the chain.

The electronic and transport properties of two-dimensional conjugated polymer networks including disorder

Nanoscale ◽  
2016 ◽  
Vol 8 (3) ◽  
pp. 1642-1651 ◽  
Author(s):  
Jean-Joseph Adjizian ◽  
Aurélien Lherbier ◽  
Simon M.-M. Dubois ◽  
Andrés Rafael Botello-Méndez ◽  
Jean-Christophe Charlier
Keyword(s):  
Conjugated Polymers ◽  
Transport Properties ◽  
Electronic Structures ◽  
Conjugated Polymer ◽  
Polymer Networks ◽  
Two Dimensional

Two-dimensional conjugated polymers exhibit electronic structures analogous to that of graphene with the peculiarity of π–π* bands which are fully symmetric. Here we report their electronic and transport properties in the presence of defects.

The Effects of Annealing on Doped P3HT Thin Films for Potential Electronic Applications

MRS Advances ◽  
2019 ◽  
Vol 4 (31-32) ◽  
pp. 1787-1792
Author(s):  
Faniya C. Doswell ◽  
Harold O. Lee ◽  
Jonathan J. Montes ◽  
Sam-Shajing Sun
Keyword(s):  
Thin Films ◽  
Conjugated Polymers ◽  
Electronic Properties ◽  
Polymer Matrix ◽  
Lower Energy ◽  
Energy State ◽  
Optoelectronic Devices ◽  
Device Performance ◽  
Conjugated Materials ◽  
Improve Device

ABSTRACTPolymeric conjugated materials are convenient for developing future soft-material-based semiconductors, conductors, electronic and optoelectronic devices due to their inherent features. Similar to their inorganic counterparts, the addition of certain minority molecules, or dopants, to polymeric conjugated materials can significantly alter the electronic and optoelectronic properties of the host conjugated polymers or composites. This allows for tunability of a variety of electronic and optoelectronic applications. One way to improve device performance is through the process of thermal annealing. Annealing allows for a polymer matrix to self-assemble into a lower energy state, which leads to an increase in crystallinity and higher charge mobility. Previous research does not explicitly define how dopants can affect this process. This study involves an evaluation of the effects of annealing with doped P3HT films to demonstrate changes in optoelectronic and electronic properties.

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