caa a22 4500 475760670 CHVBK 20180406123550.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/BF02496337 doi (NATIONALLICENCE)springer-10.1007/BF02496337 Excimer fluorescence and structures of the inclusion complexes of β-cyclodextrin with naphthalene and its derivatives [Elektronische Daten] [V. Nazarov, V. Avakyan, T. Vershinnikova, M. Alfimov] Fluorescence of the inclusion complexes with different compositions formed by naphthalene-h8, naphthalene-d8, 2,7-dimethylnaphthalene (DMN), and 2-benzylnaphthalene (BN) with β-cyclodextrin (β-CD) in water was studied. Two types of fluorescence are observed, monomer (MF) and excimer (EF_ fluorescence. The excimer fluorescence of the 2∶2 complex emitted by aggregated light-dispersing crystals forming a precipitate, whereas is the MF is concentrations, EF predominates for the resulting complexes. A proposed structure of the inclusion complexes was derived from MNDO/PM3 semiempirical quantum-chemical calculations. The EF is caused by the structure of the complex, in which both naphthalene molecules are separated by a distance of 4.7 Å: they lie in parallel orientation to each other, whereby one ring is displaced from the other by one-fourth of the length of the naphthalene ring. The complexes of 2,7-DMN and 2-benzylnaphthalene with β-CD do not exhibit EF. For the 2∶2 complex of 2,7-DMN with β-CD, this is due to the fact that the aromatic fragments are removed too far from one another 2-Benzylnaphthalene is unable to form an inclusion complex with β-CD, in whose structure the aromatic fragments inside the cavity could be arranged in parallel planes; instead, it forms a 1∶2 complex with β-CD. Kluwer Academic/Plenum Publishers, 2000 β-cyclodextrin nationallicence naphthalene nationallicence naphthalene derivatives nationallicence inclusion complexes nationallicence structure of inclusion complexes nationallicence fluorescence nationallicence excimer fluorescence nationallicence semiemperical quantum-chemical calculation nationallicence MNDO/PM3 method nationallicence Nazarov V. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut Avakyan V. Photochemistry Center, Russian Academy of Sciences, 7a ul. Novatorov, 117421, Moscow, Russian Federation aut Vershinnikova T. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut Alfimov M. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/10(2000-10-01), 1699-1706 1066-5285 49:10<1699 2000 49 11172 https://doi.org/10.1007/BF02496337 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02496337 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nazarov V. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut NATIONALLICENCE 700 1- Avakyan V. Photochemistry Center, Russian Academy of Sciences, 7a ul. Novatorov, 117421, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Vershinnikova T. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut NATIONALLICENCE 700 1- Alfimov M. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russian Federation aut NATIONALLICENCE 773 0- Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/10(2000-10-01), 1699-1706 1066-5285 49:10<1699 2000 49 11172 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer