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Solid-State Fluorescence Study of Naphthalene Adsorption on Porous Material

Naphthalene adsorption profile on porous materials was studied using solid-state fluorescence spectroscopy. When naphthalene crystals were simply mixed with porous crystalline cellulose (PCC), excimer emission of naphthalene was observed after 1 min of mixing, suggesting a drastic change in the naph...

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Published in:Journal of colloid and interface science 2002-04, Vol.248 (2), p.239-243
Main Authors: Tozuka, Yuichi, Tashiro, Emi, Yonemochi, Etsuo, Oguchi, Toshio, Yamamoto, Keiji
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Language:English
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cited_by cdi_FETCH-LOGICAL-c436t-ff5871a7b0dd7625ab7eeb9e81da7ed2e925ecd27642ec9db1f5992f94a1287b3
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creator Tozuka, Yuichi
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description Naphthalene adsorption profile on porous materials was studied using solid-state fluorescence spectroscopy. When naphthalene crystals were simply mixed with porous crystalline cellulose (PCC), excimer emission of naphthalene was observed after 1 min of mixing, suggesting a drastic change in the naphthalene molecular environment during the mixing procedure. For the naphthalene–octadesyl silane (ODS)-80A or naphthalene–ODS-2 systems, the changes in adsorption profiles and fluorescence spectral pattern of naphthalene were similar to those of the naphthalene–PCC system. The final amounts of naphthalene adsorbed to ODS-80A and ODS-2 were 0.05 and 0.024 g/g adsorbent, respectively, even though the two materials had comparable values of specific surface area. The relative emission intensity (Iexcimer/Imonomer) in the ODS-80A system was higher than that in the ODS-2 system when compared at the same amount of naphthalene adsorbed. It was concluded that the pore size of porous materials affected the naphthalene excimer formation on the surface.
doi_str_mv 10.1006/jcis.2001.8142
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When naphthalene crystals were simply mixed with porous crystalline cellulose (PCC), excimer emission of naphthalene was observed after 1 min of mixing, suggesting a drastic change in the naphthalene molecular environment during the mixing procedure. For the naphthalene–octadesyl silane (ODS)-80A or naphthalene–ODS-2 systems, the changes in adsorption profiles and fluorescence spectral pattern of naphthalene were similar to those of the naphthalene–PCC system. The final amounts of naphthalene adsorbed to ODS-80A and ODS-2 were 0.05 and 0.024 g/g adsorbent, respectively, even though the two materials had comparable values of specific surface area. The relative emission intensity (Iexcimer/Imonomer) in the ODS-80A system was higher than that in the ODS-2 system when compared at the same amount of naphthalene adsorbed. 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subjects Adsorption
Cellulose - chemistry
Chemistry
Crystallization
Exact sciences and technology
excimer
fluorescence
General and physical chemistry
naphthalene
Naphthalenes - chemistry
Porosity
porous crystalline cellulose
Sensitivity and Specificity
Solid-gas interface
Spectrometry, Fluorescence - methods
Surface physical chemistry
Surface Properties
Time Factors
title Solid-State Fluorescence Study of Naphthalene Adsorption on Porous Material
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