Photoconductive Liquid-Crystalline Derivatives of 6-Oxoverdazyl

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• 作者：Aleksandra Jankowiak ; Damian Pociecha ; Jacek Szczytko ; Hirosato Monobe ; Piotr Kaszy艅ski
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：February 8, 2012
• 年：2012
• 卷：134
• 期：5
• 页码：2465-2468
• 全文大小：273K
• 年卷期：v.134,no.5(February 8, 2012)
• ISSN：1520-5126

文摘

1,3,5-Triphenyl-6-oxoverdazyl radicals 1[n], in which each phenyl group is substituted with three alkylsulfanyl groups (n = 6, 8, 10), exhibit a monotropic columnar rectangular (Col_r) phase below 60 掳C. Detailed analysis of 1[n] revealed a broad absorption band in the visible region with maxima at 540 and 610 nm and redox potentials E_1/2^0/+1 = +0.99 V and E_1/2^0/鈥? = 鈭?.45 V vs SCE. Photovoltaic studies of 1[8] demonstrated a hole mobility of 1.52 脳 10^鈥? cm² V^鈥? s^鈥? in the mesophase with an activation energy of 0.06 卤 0.01 eV. Magnetization studies of 1[8] revealed nearly ideal paramagnetic behavior in either the solid or fluid phase above 200 K and weak antiferromagnetic interactions at low temperatures.