Abstract
it was first described in 1969 by Robert Mulliken, the charge-transfer (CT) chemical reaction has received unparalleled attention and inspired extensive research efforts. This is because CT yields new charge-transfer complexes (CTCs) with unique physical, biological, and chemical characteristics that render them beneficial to academia, material science, medicine, and pharmacology. The formation of CTCs by the liquid-state reaction is described well in literature, while their formation by the solid-state reaction is less well studied. For this reason, we conducted a series of works to reveal the formation of CTCs by solid-state reaction between the donor and acceptor. This work represents a model CT complex generated by liquid- and solid-state reactions between a typical donor (triamterene) and a typical acceptor (2, 3-dichloro-5,6-dicyano-p-benzoquinone; DDQ). Outcomes in this work indicate that both reaction types (liquid- and solid-state) yielded the same CT complex between the investigated donor and acceptor molecules, which were bridged by a n -> pi* transition. (C) 2021 Elsevier B.V. All rights reserved.