Ion-depended photochromism of oxadiazole containing spiropyrans

New 8-(5-(p-tolyl)-1,3,4-oxadiazol-2-yl) substituted spirobenzopyrans appear as polychromogenic molecular system demonstrating both positive photochromism and ionochromic properties. Introduction of electron withdrawing formyl group into 6-position of the pyran part leads to increasing of spiropyran photocoloration reaction efficiency but decreases thermodynamical stability of merocyanine form complexes. Upon irradiation with visible light colored solutions of complexes with Zn 2+ , Cd 2+ ions exhibiting negative photochromism, undergo reversible discoloration as a result of photodissociation characterized by the quantum yields reaching 46%. On one side this allows realizing controlled by light irradiation cation induced isomerizations into complexes of the merocyanine form. On the other hand, a system, in which direction of photochromic transformations can be driven by transition metal ions, can be designed. © 2019 Elsevier B.V.

Authors
Chernyshev A.V.1 , Voloshin N.A.1 , Solov'eva E.V.1 , Gaeva E.B.1 , Zubavichus Y.V. 2 , Lazarenko V.A. 3 , Vlasenko V.G. 4 , Khrustalev V.N. 5 , Metelitsa A.V.1
Language
English
Pages
201-210
Status
Published
Volume
378
Year
2019
Organizations
  • 1 Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka Ave., Rostov on Don, 344090, Russian Federation
  • 2 Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk, 630090, Russian Federation
  • 3 National Research Center “Kurchatov Institute”, Acad. Kurchatov Sq., 1, Moscow, 123182, Russian Federation
  • 4 Institute of Physics, Southern Federal University, 194 Stachka Ave., Rostov on Don, 344090, Russian Federation
  • 5 Inorganic Chemistry Department, Peoples’ Friendship University of Russia, 6 Miklukho-Maklay St., Moscow, 117198, Russian Federation
Keywords
Binding constants; Metal complex; Negative photochromism; Positive photochromism; Quantum yield; Spiropyran
Date of creation
19.07.2019
Date of change
19.07.2019
Short link
https://repository.rudn.ru/en/records/article/record/38609/