Single-chain and monolayered conjugated polymers for molecular electronics

2016 ◽  
Vol 27 (8) ◽  
pp. 1209-1222 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao Li
Keyword(s):  
Conjugated Polymers ◽  
Molecular Electronics ◽  
Single Chain

scholarly journals Impact of charge carrier injection on single-chain photophysics of conjugated polymers

2016 ◽  
Vol 108 (26) ◽  
pp. 263301 ◽  
Author(s):  
Felix J. Hofmann ◽  
Jan Vogelsang ◽  
John M. Lupton
Keyword(s):  
Charge Carrier ◽  
Conjugated Polymers ◽  
Carrier Injection ◽  
Single Chain ◽  
Charge Carrier Injection

Single chain versus single aggregate spectroscopy of conjugated polymers. Where is the border?

2010 ◽  
Vol 12 (37) ◽  
pp. 11770 ◽  
Author(s):  
Hongzhen Lin ◽  
Ralph P. Hania ◽  
Robert Bloem ◽  
Oleg Mirzov ◽  
Daniel Thomsson ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Single Chain

Processable Thiophene Copolymer With A Chiral Amino Acid Side Chain

1995 ◽  
Vol 413 ◽  
Author(s):  
Srinivasan Balasubramanian ◽  
Kethinni G. Chittibabu ◽  
Jayant Kumar ◽  
Sukant K. Tripathy
Keyword(s):  
Amino Acid ◽  
Conjugated Polymers ◽  
Molecular Electronics ◽  
Optical Rotatory Dispersion ◽  
Side Chain ◽  
Amino Acid Side Chain ◽  
Optical Rotatory ◽  
Polymeric Systems ◽  
Photorefractive Materials ◽  
Uv Visible

ABSTRACTConjugated polymers in general, and polythiophenes in particular have been attracting attention in the field of molecular electronics. Polythiophenes functionalized at the β- position with various groups have resulted in processable, conjugated polymeric systems with applications such as organic electrodes, photorefractive materials, electro-luminescent devices, among others. We report the synthesis of a thiophene copolymer with alkyl and chiral amino acid substituents at the β- position. We have synthesized a solution processable poly[3-octylthiophene-co-(N-1-carboxyl, 2- (4-hydroxy-3-nitrophenyl)ethyl)-3-thiophene acetamide] with 3-nitro-L-Tyrosine as the chiral amino acid side chain. The UV-Visible and optical rotatory dispersion spectra of the new copolymer are discussed.

Influence of Backbone Rigidness on Single Chain Conformation of Thiophene-Based Conjugated Polymers

2013 ◽  
Vol 117 (16) ◽  
pp. 4461-4467 ◽  
Author(s):  
Zhongjian Hu ◽  
Jianhua Liu ◽  
Lauren Simón-Bower ◽  
Lei Zhai ◽  
Andre J. Gesquiere
Keyword(s):  
Conjugated Polymers ◽  
Chain Conformation ◽  
Single Chain

Single-chain polymerization dynamics and conformational mechanics of conjugated polymers

Chem ◽  
2021 ◽  
Author(s):  
Susil Baral ◽  
Chunming Liu ◽  
Udit Kumar Chakraborty ◽  
Kaori Kubo ◽  
Xianwen Mao ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Single Chain ◽  
Chain Polymerization

scholarly journals Advances in Fluorescent Single-Chain Nanoparticles

2017 ◽  
Author(s):  
Julen De-La-Cuesta ◽  
Edurne Gonzalez ◽  
José A. Pomposo
Keyword(s):  
Conjugated Polymers ◽  
Cancer Diagnosis ◽  
Cell Biology ◽  
Polymer Networks ◽  
Imaging Systems ◽  
Single Chain ◽  
Fluorescent Properties ◽  
Biomarker Analysis ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Fluorophore molecules can be monitored by fluorescence spectroscopy and microscopy which are highly useful and widely used techniques in cell biology, biochemistry and medicine (e.g., biomarker analysis, immunoassays, cancer diagnosis). Several fluorescent micro- and nanoparticle systems based on block copolymer micelles and cross-linked polymer networks, quantum dots, -conjugated polymers, and dendrimers have been evaluated as optical imaging systems. In this review, we highlight recent advances in the construction of fluorescent single-chain nanoparticles (SCNPs) which are valuable artificial soft nano-objects with tunable, small size (as small as 3 nm). In particular, the main methods currently available to endow SCNPs with fluorescent properties are discussed in detail, showing illustrative examples.

scholarly journals Direct observation of backbone planarization via side-chain alignment in single bulky-substituted polythiophenes

2018 ◽  
Vol 115 (11) ◽  
pp. 2699-2704 ◽  
Author(s):  
Dominic Raithel ◽  
Lena Simine ◽  
Sebastian Pickel ◽  
Konstantin Schötz ◽  
Fabian Panzer ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Electronic Properties ◽  
Red Shift ◽  
Structural Motif ◽  
Side Chain ◽  
Side Chains ◽  
Single Chain ◽  
Optical And Electronic Properties ◽  
Backbone Conformation ◽  
The Impact

The backbone conformation of conjugated polymers affects, to a large extent, their optical and electronic properties. The usually flexible substituents provide solubility and influence the packing behavior of conjugated polymers in films or in bad solvents. However, the role of the side chains in determining and potentially controlling the backbone conformation, and thus the optical and electronic properties on the single polymer level, is currently under debate. Here, we investigate directly the impact of the side chains by studying the bulky-substituted poly(3-(2,5-dioctylphenyl)thiophene) (PDOPT) and the common poly(3-hexylthiophene) (P3HT), both with a defined molecular weight and high regioregularity, using low-temperature single-chain photoluminescence (PL) spectroscopy and quantum-classical simulations. Surprisingly, the optical transition energy of PDOPT is significantly (∼2,000 cm−1 or 0.25 eV) red-shifted relative to P3HT despite a higher static and dynamic disorder in the former. We ascribe this red shift to a side-chain induced backbone planarization in PDOPT, supported by temperature-dependent ensemble PL spectroscopy. Our atomistic simulations reveal that the bulkier 2,5-dioctylphenyl side chains of PDOPT adopt a clear secondary helical structural motif and thus protect conjugation, i.e., enforce backbone planarity, whereas, for P3HT, this is not the case. These different degrees of planarity in both thiophenes do not result in different conjugation lengths, which we found to be similar. It is rather the stronger electronic coupling between the repeating units in the more planar PDOPT which gives rise to the observed spectral red shift as well as to a reduced calculated electron−hole polarization.

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