CONDUCTIVITY AND STRUCTURE OF A LIQUID-CRYSTALLINE ORGANIC CONDUCTOR

被引：66
作者：
VAUGHAN, GBM
HEINEY, PA
MCCAULEY, JP
SMITH, AB
机构：
[1] UNIV PENN, RES STRUCT MATTER LAB, PHILADELPHIA, PA 19104 USA
[2] UNIV PENN, DEPT CHEM, PHILADELPHIA, PA 19104 USA
来源：
PHYSICAL REVIEW B | 1992年 / 46卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.46.2787
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured the dc conductivity and lattice parameters of hexa(hexylthio)triphenylene (HHTT) saturation doped by exposure to iodine vapor, using a four-probe resistivity technique and powder x-ray diffraction. The compound was further characterized by differential scanning calorimetry, thermogravimetric analysis, and polarizing microscopy. Pure HHTT is an insulator, and displays monoclinic crystal (K), incommensurate helical (H), columnar liquid crystal (D(hd)), and isotropic liquid (I) phases. The iodine-doped compound retains the K, D(hd), and I phases, but the H phase is suppressed. In addition, the conductivity rises 4-5 orders of magnitude after doping, so that the iodine-HHTT complex has a powder conductivity characteristic of a semiconducting radical-ion salt.
引用
收藏
页码：2787 / 2791
页数：5
相关论文
共 28 条
[1]   ONE-DIMENSIONAL ELECTRONIC CONDUCTIVITY IN DISCOTIC LIQUID-CRYSTALS [J].
BODEN, N ;
BUSHBY, RJ ;
CLEMENTS, J ;
JESUDASON, MV ;
KNOWLES, PF ;
WILLIAMS, G .
CHEMICAL PHYSICS LETTERS, 1988, 152 (01) :94-99
[2]   DISCOTIC LIQUID-CRYSTALS [J].
CHANDRASEKHAR, S ;
RANGANATH, GS .
REPORTS ON PROGRESS IN PHYSICS, 1990, 53 (01) :57-84
[3]   CHARGE-TRANSFER SALTS OF HIGHLY ORIENTED FIBERS OF DISCOTIC LIQUID-CRYSTAL HET-N [J].
CHIANG, LY ;
STOKES, JP ;
SAFINYA, CR ;
BLOCH, AN .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1985, 125 (1-4) :279-288
[4]   NATURE OF THE MESOPHASE OF A CONDUCTING CHARGE-TRANSFER COMPLEX - NEITHER DISCOTIC NOR CALAMITIC [J].
DAVIDSON, P ;
LEVELUT, AM ;
STRZELECKA, H ;
GIONIS, V .
JOURNAL DE PHYSIQUE LETTRES, 1983, 44 (19) :L823-L828
[5]   MOLECULAR DISORDER IN COLUMNAR-PHASE DISCOTIC LIQUID-CRYSTAL STRANDS [J].
FONTES, E ;
HEINEY, PA ;
OHBA, M ;
HASELTINE, JN ;
SMITH, AB .
PHYSICAL REVIEW A, 1988, 37 (04) :1329-1334
[6]   LIQUID-CRYSTALLINE AND HELICAL ORDER IN A DISCOTIC MESOPHASE [J].
FONTES, E ;
HEINEY, PA ;
DEJEU, WH .
PHYSICAL REVIEW LETTERS, 1988, 61 (10) :1202-1205
[7]   HIGH-RESOLUTION X-RAY-SCATTERING STUDY OF THE MULTIPLY REENTRANT POLAR MESOGEN DB9ONO2 [J].
FONTES, E ;
HEINEY, PA ;
HASELTINE, JL ;
SMITH, AB .
JOURNAL DE PHYSIQUE, 1986, 47 (09) :1533-1539
[8]   LIQUID-CRYSTALLINE ORGANIC CONDUCTORS - STUDIES IN CRYSTALLINE AND MESOMORPHIC PHASE [J].
GIONIS, V ;
STRZELECKA, H ;
VEBER, M ;
KORMANN, R ;
ZUPPIROLI, L .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1986, 137 (1-4) :365-372
[9]   SOLID-STATE STRUCTURE AND OXIDATIONS STATES IN BIS(DIPHENYLGLYOXIMATO(NICKEL AND BIS(DIPHENYLGLYOXIMATO)PALLADIUM IODIDES [J].
GLEIZES, A ;
MARKS, TJ ;
IBERS, JA .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1975, 97 (12) :3545-3546
[10]   X-RAY-INVESTIGATION OF DISCOTIC MESOPHASES OF ALKYLTHIO SUBSTITUTED TRIPHENYLENES [J].
GRAMSBERGEN, EF ;
HOVING, HJ ;
DEJEU, WH ;
PRAEFCKE, K ;
KOHNE, B .
LIQUID CRYSTALS, 1986, 1 (04) :397-400
123