Molecular Forms of Rhodamine B in Dip-Coated Thin Films

Nishikiori, Hiromasa; Fujii, Tsuneo

doi:10.1021/jp962734x

Cited by 68 publications

(74 citation statements)

References 39 publications

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“…These results lead to the concept of the microscopic configurational relationships between dye molecules and the SiOSi polymers in a fluid sol and in the dip-coated films [26].…”

Section: Aggregation Of 9-aminoacridine Species In the Thin Sol−gel Fmentioning

confidence: 94%

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Molecular forms and fluorescence processes of 9-aminoacridine in thin sol–gel films

Nishikiori

Tanaka

Minami

et al. 2010

Journal of Photochemistry and Photobiology A: Chemistry

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Molecular aggregation and fluorescence processes of 9-aminoacridine (9AA) in thin silica gel films have been investigated by the steady state and time-resolved fluorescence measurements.The monomer of 9AA was the preferential species in the solgel reaction systems of tetraethylorthosilicate until the gelation occurred. The 9AA molecules formed the dimer or higher aggregates just after preparing the dip-coated thin film from the solgel system. The extent of the aggregation decreased in the film prepared from the system in which the reaction further proceeded. This result indicates that the aggregation in the prepared film was gradually prevented by the steric hindrance of the SiO 2 network with the progress of the solgel reaction. The fluorescence properties of 9AA revealed the behavior of the molecules due to the change in the physicochemical environment in the matrix.

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“…These results lead to the concept of the microscopic configurational relationships between dye molecules and the SiOSi polymers in a fluid sol and in the dip-coated films [26].…”

Section: Aggregation Of 9-aminoacridine Species In the Thin Sol−gel Fmentioning

confidence: 94%

“…Furthermore, the thin films containing RB were prepared from the solgel reaction system as a function of time after mixing of the reaction systems [26]. The absorption and fluorescence spectra of RB in the individual films were observed as a function of time after the preparation of the thin films.…”

Section: Introductionmentioning

confidence: 99%

Molecular forms and fluorescence processes of 9-aminoacridine in thin sol–gel films

Nishikiori

Tanaka

Minami

et al. 2010

Journal of Photochemistry and Photobiology A: Chemistry

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“…The study of the dimer formation of organic dopants in sol-gel materials has received relatively little attention, despite the fact that monomer-dimer equilibria determine optical and photochemical behavior of the organic dyes. Only dimerization of the rare earth and copper phthalocyanines in sol-gel glasses [5,26] and rhodamine B in dip-coatings have been reported [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic characterization of water-soluble cationic porphyrins in sol–gel silica matrices and coatings

Dargiewicz¹,

Makarska²,

Radzki³

2002

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Silica aeorogels doped with different concentrations of water-soluble cationic porphyrins were synthesised by the sol-gel polymerisation of tetraethylorthosilicate (TEOS). Porphyrin dimer formation in sol-gel matrices was studied in the function of gelation time, over the porphyrin concentration range up to 10 − 5 M. The deviation from the linearity of Beer-Lambert law starts with porphyrin concentration about 5 ×10 − 6 M. The dimerization constants were estimated. The similar dependence could be observed for the aerogels and the solid thin films.

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“…Wet processes, such as the sol−gel method, are useful methods to prepare inorganic thin films containing organic compounds because they easily form nanocrystalline materials [9][10][11][12][13]. In the sol−gel matrices, the dye molecules having a high photofunction can be encapsulated in the small pores of the inorganic matrices [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Interaction between dye and zinc in the dye-dispersing ZnO films prepared by a wet process

et al. 2014

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Dye-dispersing ZnO precursor gel films were prepared on indium tin oxide electrodes from a zinc acetate solution containing eosin Y by dip-coating, steam treatment, and then heating at a low temperature. The electronic interaction between the dye and zinc in the dye-dispersing gel films were investigated by spectroscopic and electrochemical measurements. A photocurrent was observed in the dye-dispersing gel electrodes before the steam treatment. The photocurrent value increased by the steam treatment and heating due to crystallization of the gel and removal of organic impurities. The dye molecules existed between the interlayers of the layered zinc hydroxide coexisting with the ZnO. The photoexcited electron in the dye should be injected into the ZnO conduction band via the layered zinc hydroxide. The value increased with an increase in the dye content even though the ZnO crystallinity decreased.The dye-zinc interaction, i.e., the complex formation and photoinduced electron injection, played an important role in the electron transport and photoelectric conversion.

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Molecular Forms of Rhodamine B in Dip-Coated Thin Films

Cited by 68 publications

References 39 publications

Molecular forms and fluorescence processes of 9-aminoacridine in thin sol–gel films

Molecular forms and fluorescence processes of 9-aminoacridine in thin sol–gel films

Spectroscopic characterization of water-soluble cationic porphyrins in sol–gel silica matrices and coatings

Interaction between dye and zinc in the dye-dispersing ZnO films prepared by a wet process

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