Synthetic conducting materials: Charge transfer complex of 2,2'-butanediyl-bisisoquinolinium with TCNQ

2,2'-Butanediyl-bisisoquinolinium diiodide (DIQC(4)I(2)) was synthesized by reaction of isoquinoline with 1,4-diiodobutane. This salt was further reacted with TCNQ and TCNQ(-) to obtain the charge transfer complex DIQC(4). TCNQ(3). This charge transfer complex was characterized by elemental analysis, infrared, electronic, and mass spectrometry. The crystal structure of DIQC4 center dot TCNQ3 is triclinic with a = 8.1478(11), b = 10.2302(13), c = 15.041(2)angstrom, alpha = 80.987(10), beta = 81.335(10), gamma = 70.402(10), Z = 1, and space group P (1) over bar. The donors and acceptors are packed in segregated columns. The IR spectrum shows a very strong absorption envelope in the range of 4000 to 1000 cm(-1) resulting from the electronic conduction band. The electrical conductivity of DIQC(4) center dot TCNQ(3) is 2.4 x 10(-2) S/cm, at room temperature with activation energy 0.20eV, typical of semiconductor behavior.