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Mixing of Frenkel Excitons and Ionic Excited States in a Linear Crystal of Donor‐Acceptor Complex. II. ADA‐Type Complexes
Author(s) -
Petelenz P.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220990206
Subject(s) - excited state , exciton , ionic bonding , type (biology) , hamiltonian (control theory) , acceptor , chemistry , crystal (programming language) , coupling (piping) , atomic physics , physics , molecular physics , condensed matter physics , materials science , quantum mechanics , ion , mathematics , ecology , mathematical optimization , computer science , metallurgy , biology , programming language
The previously proposed Merrifield‐type model of the coupling between neutral and ionic excited states of a linear crystal of a weak AD‐type donor‐acceptor complex is generalized for ADA‐type complexes. It is demonstrated that CT interactions involving the locally excited Frenkel states can be adequately described in terms of a Hamiltonian entirely analogous to that used for AD‐type complexes but with renormalized parameters. The spectrum of ADA‐type complexes is however richer due to the appearance of a new system of absorption bands due to the (–) CT states which do not couple with the Frenkel states.