Two-Dimensional Brickblock Arrangement in Bis-Fused Tetrathiafulvalene Semiconductors

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• 作者：Takeshi Terauchi ; Satoshi Sumi ; Yuka Kobayashi ; Yoshitaka Matsushita ; Akira Sato
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：March 5, 2014
• 年：2014
• 卷：14
• 期：3
• 页码：1412-1418
• 全文大小：400K
• 年卷期：v.14,no.3(March 5, 2014)
• ISSN：1528-7505

文摘

Molecular packing arrangement is a very important factor in the charge carrier mobility of organic semiconductors, but its rational design has not been established as yet. Two-dimensional (2D) lamellar packing is an advantageous arrangement for high charge mobility, but few examples have been reported thus far. Herein we show crystal structures and the electronic properties of newly designed bis-fused tetrathiafulvalene (TTF) semiconductors with hetero substituent groups with distinct electronic effects. Unprecedented 2D lamellar alignment is achieved in a single crystal, where the bis-fused TTF rings interact three dimensionally with face-to-face and side-by-side intermolecular S路路路S contacts up to a total of 20 sites per 蟺 molecule and form graphitelike 鈥渂rickblock鈥?structure. The charge mobility of a single crystal is as high as 0.78 cm² V^鈥?聽s^鈥?. Systematic investigations of the semiconductors reveal a key role of intramolecular S路路路O interaction between a bis-fused TTF ring and a methoxycarbonyl group in controlling efficient arrangement, leading to high mobility.