| Issue |
J. Phys. Colloques
Volume 46, Number C7, Octobre 1985
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
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| Page(s) | C7-425 - C7-428 | |
| DOI | https://doi.org/10.1051/jphyscol:1985775 | |
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
J. Phys. Colloques 46 (1985) C7-425-C7-428
DOI: 10.1051/jphyscol:1985775
Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304, U.S.A.
J. Phys. Colloques 46 (1985) C7-425-C7-428
DOI: 10.1051/jphyscol:1985775
EXCITON-POLARITON AND CHARGE TRANSFER STATES IN POLYMORPHS OF QUASI-METALLIC CRYSTALS OF DYES
M. Tristani-Kendra, J. Delaney et C.J. EckhardtDepartment of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304, U.S.A.
Abstract
The reflection spectra of different crystalline forms of two dyes, pseudoisocyanine iodide (PIC) and 2,4-bis (4-diethylamino-2-hydroxy phenyl) cyclobutadienediylium-1,2-diolate (HEAPS), have been investigated in order to gain understanding of dye aggregation. The study involves clarification of earlier conflicting results for PIC and the examination of polymorphs of HEAPS. The discovery of another crystalline form of PIC is also reported. Crystal spectra are presented which indicate the possible relation to the J-band observed in dye aggregation.