Universität zu Köln

Kim, Yunseul, Kim, Yeon-Ju, Kim, Yeong-A, Jung, Eunhwan ORCID: 0000-0002-9326-6486, Mok, Yoonjung, Kim, Kihyeun ORCID: 0000-0003-0725-9739, Hwang, Hansu, Park, Jong-Jin, Kim, Min-Gon, Mathur, Sanjay and Kim, Dong-Yu (2021). Open-Shell and Closed-Shell Quinoid-Aromatic Conjugated Polymers: Unusual Spin Magnetic and High Charge Transport Properties. ACS Appl. Mater. Interfaces, 13 (2). S. 2887 - 2899. WASHINGTON: AMER CHEMICAL SOC. ISSN 1944-8252

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Abstract

While quinoidal moieties are considered as emerging platforms showing efficient charge transport and interesting open-shell diradical characteristics, whether these properties could be changed by extension to the conjugated polymer structure remains as a fundamental question. Here, we developed and characterized two conjugated polymers incorporating quinoids with different lengths, which have a stable close- and open-shell diradical character, respectively, namely, poly(quinoidal thiophene-thienylene vinylene) (PQuT-TV) and poly(quinoidal bithiophene-thienylene vinylene) (PQuBT-TV). A longer length of a quinoidal core led to enhanced diradical characteristics. Therefore, the longer core length of QuBT was favorable for the formation of an open-shell diradical structure in its monomer and in the quinoidal polymer. PQuBT-TV exhibited high spin characteristics observed by the strong ESR signal, a low band gap, and improved electrochemical stability. On the other hand, as QuT maintained a closed-shell quinoid structure, PQuT-TV exhibited high backbone coplanarity and strong intermolecular interaction, which was beneficial for charge transport and led to high hole mobility (up to 2.40 cm(2) V-1 s(-1)) in organic field-effect transistors. This work successfully demonstrated how the control of the closed/open-shell character of quinoidal building blocks changes charge transport and spin properties of quinoidal conjugated polymers via quinoid-aromatic interconversion.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kim, Yunseul UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Yeon-Ju UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Yeong-A UNSPECIFIED UNSPECIFIED UNSPECIFIED Jung, Eunhwan UNSPECIFIED orcid.org/0000-0002-9326-6486 UNSPECIFIED Mok, Yoonjung UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Kihyeun UNSPECIFIED orcid.org/0000-0003-0725-9739 UNSPECIFIED Hwang, Hansu UNSPECIFIED UNSPECIFIED UNSPECIFIED Park, Jong-Jin UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Min-Gon UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Dong-Yu UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-579986
DOI:	10.1021/acsami.0c15893
Journal or Publication Title:	ACS Appl. Mater. Interfaces
Volume:	13
Number:	2
Page Range:	S. 2887 - 2899
Date:	2021
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1944-8252
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PERFORMANCE N-TYPE; BIRADICALOID CHARACTER; VIBRATIONAL RAMAN; RATIONAL DESIGN; BUILDING-BLOCK; MOBILITY; OLIGOTHIOPHENES; SEMICONDUCTORS; CRYSTALLINITY; AGGREGATION Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57998