Photoelectron Spectroscopy of Molecular Anion of Alq3: An Estimation of Reorganization Energy for Electron Transport in the Bulk

Toshiaki Yanase; Ryuzo Nakanishi; Satoru Muramatsu; Kiichirou Koyasu; Hiroyuki Yoshida; Takashi Nagata; Tatsuya Tsukuda

doi:10.1021/acsomega.8b02206

Photoelectron Spectroscopy of Molecular Anion of Alq₃: An Estimation of Reorganization Energy for Electron Transport in the Bulk

ACS Omega. 2018 Nov 9;3(11):15200-15204. doi: 10.1021/acsomega.8b02206. eCollection 2018 Nov 30.

Authors

Toshiaki Yanase¹, Ryuzo Nakanishi², Satoru Muramatsu¹, Kiichirou Koyasu¹, Hiroyuki Yoshida^{3

3}, Takashi Nagata², Tatsuya Tsukuda¹

Affiliations

¹ Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
² Department of Basic Science, School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
³ Graduate School of Engineering and Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.

Abstract

A molecular anion of tris(8-hydroxyquinolinato)aluminum (Alq₃) was generated by a pulsed discharge to the solid sample under supersonic expansion and its photoelectron spectrum was recorded after mass selection. The vertical detachment energy of Alq₃ ^- and the adiabatic electron affinity of Alq₃ were determined to be 1.24 ± 0.01 and 0.89 ± 0.04 eV, respectively. By using these energies determined for monomeric Alq₃, the reorganization energy for the intermolecular electron transport in bulk Alq₃ was estimated to be 0.70 ± 0.08 eV.