1996
DOI: 10.1021/ja952112+
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Abstract: The visible absorption band of iodine adsorbed on zeolite blue-shifted with increasing the electropositivity of the countercation and the aluminum content in the framework. This phenomenon was attributed to the increase in the donor strength of the zeolite framework based on the analogous spectral shift of iodine in solution. In support of this, a negative linear correlation was observed between the measured visible bands of iodine adsorbed on various zeolites and their calculated Sanderson's intermediate elec… Show more

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Cited by 53 publications
(53 citation statements)
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“…[17][18][19] Considering that λ max,HL of I 2 adsorbed on pure siliceous MCM-41 material is 508 nm, 19 oxygen atoms on the Et-PMO surface result to have a higher EDA than those of pure silica, as expected considering the donor inductive effect of aryl group, 11 and in agreement with data obtained for iodine dissolved in BTEE and TEOS precursors discussed above.…”
Section: Resultssupporting
confidence: 88%
See 1 more Smart Citation
“…[17][18][19] Considering that λ max,HL of I 2 adsorbed on pure siliceous MCM-41 material is 508 nm, 19 oxygen atoms on the Et-PMO surface result to have a higher EDA than those of pure silica, as expected considering the donor inductive effect of aryl group, 11 and in agreement with data obtained for iodine dissolved in BTEE and TEOS precursors discussed above.…”
Section: Resultssupporting
confidence: 88%
“…16,17 Only in the past decade, however, measurements have been reported using the HL-band of adsorbed iodine to probe the donor strength of zeolites and other inorganic oxides, such as MgO, γ-alumina, and mesoporous silica. 18,19 It has to be remarked that solids exposing strong electronrich sites are able to cause the dissociation of a pair of I 2 molecules into I + and I 3 -ions, 19 by stabilizing the cation I + , not visible in the UV-visible spectrum, so that only the triiodide anion is revealed. This process, which does not involve any electron transfer from the solid, is also well-known in the case of liquid phase interaction.…”
Section: Introductionmentioning
confidence: 99%
“…23 They used the concept of intermediate electronegativities introduced by Sanderson. These effective values are calculated from the electronegativities of the individual elements in the unit cell.…”
Section: Resultsmentioning
confidence: 99%
“…Iodine has been used to evaluate the active electron donor sites in zeolites by monitoring changes in the visible absorption band [32]. Halogen bonding was even found to play an important role in the rheology and carbonization of coal tar pitch [33] and in the recovery of metals such as gold [34] and mercury [35].…”
Section: Significance Of Halogen Bonding With Dihalogensmentioning
confidence: 99%