A Methyl-Substituted Thiophene-Tetrathiafulvalene Donor and Its Salts

被引:2
作者
Silva, Rafaela A. L. [2 ]
Santos, Isabel C. [2 ]
Lopes, Elsa B. [2 ]
Rabaca, Sandra [2 ]
Galindo, Sergi [3 ,4 ]
Mas-Torrent, Marta [3 ,4 ]
Rovira, Concepcio [3 ,4 ]
Almeida, Manuel [2 ]
Belo, Dulce [1 ,2 ]
机构
[1] Univ Lisbon, Inst Super Tecn, C2TN, P-2695066 Bobadela Lrs, Portugal
[2] Univ Lisbon, Inst Super Tecn, C2TN, P-2695066 Bobadela Lrs, Portugal
[3] Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Spain
[4] CIBER BBN, Bellaterra 08193, Spain
关键词
Redox chemistry; Sulfur heterocycles; Charge transfer; Conducting materials; Transistors; FIELD-EFFECT TRANSISTORS; SPIN-LADDER; CRYSTAL-STRUCTURE; BEDT-TTF; BET-TTF; DT-TTF; COMPLEXES; FAMILY; FE; THERMOPOWER;
D O I
10.1002/ejic.201500806
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
alpha-Methyldithiophene-tetrathiafulvalene (-mDT-TTF), the first alkyl-substituted thiophene-tetrathiafulvalene electronic donor, and some of its charge-transfer salts were explored. The crystal structure of -mDT-TTF is composed of molecular stacks aligned parallel to each other. Its cyclic voltammetry shows higher electron-donor ability than the unsubstituted analogue. This material was employed as a semiconductor in an organic field-effect transistor and showed a mobility of 4x10(-4) cm(2)V(-1)s(-1). Two charge-transfer salts of this donor with [M(mnt)(2)](-) anions (mnt = maleonitriledithiolate), M = Co and Au, were obtained by electrocrystallization; they present unusual stoichiometries: (-mDT-TTF)[Co(mnt)(2)] and (-mDT-TTF)(3)[Au(mnt)(2)](2). In the cobalt compound, the donor molecules are fully oxidized and the Co complex is dimerized; it presents semiconducting behavior (7x10(-3) Scm(-1)). The gold compound is composed of alternating stacks of donor trimers and pairs of anions.
引用
收藏
页码:5003 / 5010
页数:8
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