A solid-state effect responsible for an organic quintet state at room temperature and ambient pressure

Yonghao Zheng; Mao-sheng Miao; Géraldine Dantelle; Nancy D Eisenmenger; Guang Wu; Ilhan Yavuz; Michael L Chabinyc; Ken N Houk; Fred Wudl

doi:10.1002/adma.201405093

A solid-state effect responsible for an organic quintet state at room temperature and ambient pressure

Adv Mater. 2015 Mar 11;27(10):1718-23. doi: 10.1002/adma.201405093. Epub 2015 Jan 23.

Authors

Yonghao Zheng¹, Mao-sheng Miao, Géraldine Dantelle, Nancy D Eisenmenger, Guang Wu, Ilhan Yavuz, Michael L Chabinyc, Ken N Houk, Fred Wudl

Affiliation

¹ California NanoSystems Institute, University of California, Santa Barbara, CA, 93106, USA; Tohoku University WPI-AIMR and CNSI Joint Center, University of California, Santa Barbara, CA, 93106, USA.

PMID: 25619560
DOI: 10.1002/adma.201405093

Abstract

A stable organic diradicaloid with an intermolecular quintet at room temperature as a polycrystalline solid is studied. The conclusion is supported by the observation of the ΔMs = ±2 forbidden transition, electron spin resonance (ESR) simulations, and density functional theory (DFT) calculations. In addition, the molecule, as the active component of a device, is an outstanding near-infrared photodetector with detectivity over 10(11) cm Hz(1/2) W(-1) at 1200 nm.

Keywords: diradicaloids; electron spin resonance; photodetectors; quintet states.