Abstract

Steady-state fluorescence has been used to study the inclusion complexes of 2-methylnaphthoate (MN) with alpha- and beta-cyclodextrins (CDs). Emission spectra of MN show two bands that are very sensitive to the CD concentration and temperature. The stoichiometry and formation constants of these complexes were investigated by obtaining the ratio of the two bands. Results showed identical stoichiometry (1:1) for both MN/ alpha-CD and MN/ beta-CD complexes. However, the estimated formation constants were quite different. The thermodynamic parameters Delta H and Delta S were obtained from vant'Hoff plots. Results showed that MN/ alpha-CD complexation is accompanied by an high enthalpy change, while MN/ beta-CD complexation is mainly entropically favored. Anisotropy measurements were used to interpret the different signs of Delta S upon inclusion for both complexes. In addition, 2-methylnaphthoate seems to be a good probe for estimating microenvironmental polarity. Effective dielectric constants of inner alpha- and beta-CD cavities were evaluated.

Time-resolved spectroscopy measurements of hydrogen-alpha, -beta, and -gamma emissions

Christian G. Parigger, Matthew Dackman, and James O. Hornkohl
Appl. Opt. 47(31) G1-G6 (2008)

Separately reconstructing the structural and functional parameters of a fluorescent inclusion embedded in a turbid medium

Baohong Yuan and Quing Zhu
Opt. Express 14(16) 7172-7187 (2006)

Beta-distributed oscillator model as an empirical extension to the Lorentzian oscillator model: physical interpretation of the ${\beta \_{{\rm do}}}$β_do model parameters

Olaf Stenzel and Steffen Wilbrandt
Appl. Opt. 58(33) 9318-9325 (2019)

Influence of the preparation technique on the optical properties and content of heterophase inclusions of AS₂S₃ chalcogenide glasses

L. A. Mochalov, A. S. Lobanov, A.V. Nezhdanov, A. I. Mashin, M. A. Kudryashov, A. V. Strikovskiy, A.V. Kostrov, A. V. Vorotyntsev, and V. M. Vorotyntsev
Opt. Mater. Express 6(11) 3507-3517 (2016)

Temperature field analysis of TiO₂ films with high-absorptance inclusions

Shu-hong Li, Hong-bo He, Da-wei Li, Ming Zhou, Xiu-lan Ling, Yuan-an Zhao, and Zheng-xiu Fan
Appl. Opt. 49(3) 329-333 (2010)