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Spiropyrans for light-controlled drug delivery
Dalton Transactions, 2019The supramolecular assembly of acetylsalicylic acid to a merocyanine–Zn complex translates into a photo-controllable drug delivery system.
Cardano, Francesca +2 more
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Solid-Phase Synthesis of Photochromic Spiropyrans
Organic Letters, 2005[reaction: see text] A convenient solid-phase synthesis of spiropyrans is described. A succinate linker was employed, which allows base-catalyzed cleavage of the desired photochromophore derivatized with a succinimide. Excellent yields and purities were obtained for the compounds that comprise a library of 23 spiropyrans.
Weili, Zhao, Erick M, Carreira
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Theoretical study of spiropyran–merocyanine thermal isomerization
Chemical Physics Letters, 2004Quantum mechanical computations at DFT level were carried out on the processes involved in the thermal reaction SP¡ME, where SP is the nitro-substituted spirobenzopyran (1',3'-dihydro-1',3',3'-trimethyl-6-nitro-spiro[2H-1-benzopyran-2,2'- [2H]indole]) in the closed form and ME is the corresponding open form.
Grazia Cottone +2 more
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Merocyanine–spiropyran relaxation processes
The European Physical Journal D, 2018In the paper mechanisms of merocyanine–spiropyran transformation were investigated. It was shown that in dark conditions for such transformation it is necessary to overcome the potential barrier with height of ~0.6 eV. A barrierless transformation into the spiropyran molecule is possible due to the rotation of the phenyl moiety of the merocyanine ...
Olha Kovalenko +3 more
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Spiropyrans: Structural Features and Photochemical Properties
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1990Abstract It has been shown, that in the ground state the Cspiro−O bond, which is broken upon photoexcitation, is weakened and elongated because of specific orbital n-s* interactions. They become stronger in excited photochemically active state, thus facilitating the rupture of this bond.
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ChemInform Abstract: SPIROPYRANE DER PHENANTHRIDINREIHE
Chemischer Informationsdienst, 1974Abstract1 Mol des Phenanthridinsalzes (I) und 1 Mol der Aldehyde (II) erhitzt man in Äthanol in Gegenwart von 2 Mol Piperidin zum Sieden.
E. R. ZAKHS +2 more
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Photochromic Spiropyran Resists
Journal of The Electrochemical Society, 1969M. Orlovic, E. Stone, I. M. Pearson
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