Novel Cross-Linked Ortho-Carborane and Ortho-Carborane:Y (Y=1,4-Diaminobenzene, Pyridine, Benzene) Polymer Films: A New Class of Carborane-Based Materials with Tunable Electronic Structure

• DOI: 10.1149/05301.0303ecst
• Publication Date: 2013-05-02T22:48:31Z
• Authors: Frank L Pasquale; Robinson James; Raymond Welch; Elena Echeverria; Peter A. Dowben; Jeffry A. Kelber
• Keywords: Carborane; Boron carbide

A new class of semi-conducting boron carbide polymers has been formed from cross-linking ortho -carborane ( o -B 10 C 2 H 12 ) or o- B in the presence aromatic compounds (Y =1,4-diaminobenzene, pyridine, and benzene) to form X :Y, respectively. Core valence band photoemission molecular orbital calculations indicate that results site-specific bonding between sites opposite carbon on carborane icosahedra. This site specificity is retained when linking units; units insert themselves insertion icosahedra moieties. :Y films exhibit shifts maximum -4.3 eV (i.e. 4.3 below Fermi level) for x , -2.6 eV, -2.2 -1.7 Y = benzene, 1,4-diaminobenzene, States near top correspond states localized unit. Films by plasma-enhanced chemical vapor deposition are p-doped, such show excellent rectifying characteristics deposited n-type Si--extremely promising neutron detection other device applications.