Synthesis and Optical Properties of Group 14 Element-Thienyl Polymers

Functional polymer materials containing heavy group‐14 elements focusing on germanium and tin

“…Organogermanium polymers with σ-or σ-π-conjugation exhibit unique physical properties derived from the electronic state of the conjugated system and have attracted attention for their use as semiconductors. [97,98] The conductivities of germanium-containing polymers were investigated by preparing the polymers composed of Ge-Ge bonds connected by three types of π-conjugated linkers, vinylene (29), thiophene (30), and phenylene (31). [83] After antimony pentafluoride (SbF 5 ) doping, the polymers showed electrical conductivities of the order of 10 -4 S/cm, which are similar to or a little higher than those of corresponding silicon analogs.…”

New insight into the photophysics and reactivity of trigonal and tetrahedral arylboron compounds

“…[1][2][3][4][5][6][7][8][9][10][11] In particular, these compounds combine the properties of extended organic π-systems with the unique features of semi-metals, leading to novel materials with many desirable chemical and physical properties (larger extinction coefficients, Lewis acid-base reactivity, stronger emission intensities, etc.). 4,[12][13][14][15][16][17][18][19][20] The presence of the empty p z orbital on the trigonal boron atom and its effective π-electron extension with attached aryl groups has been used to advantage by several research groups to provide new candidates for modern optoelectronic materials. [5][6][7]12 The replacement of selected carbon atoms with main-group heteroatoms such as boron has proven useful in circumventing some shortcomings of purely organic systems.…”