2008
DOI: 10.1002/poc.1468
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A solvatochromic study of silicates and borate containing 4‐nitrocatechol ligands

Abstract: Solvatochromism of 4‐nitrocatechol (1), tetra‐n‐butylammonium 2‐hydroxy‐4‐nitrophenolate (2), sodium tris(4‐nitrobenzene‐1,2‐diolato)silicate (3a), tetra‐n‐butylammonium tris(4‐nitrobenzene‐1,2‐diolato)silicate (3b), pyrrolidinium tris(4‐nitrobenzene‐1,2‐diolato)silicate (3c), (3‐amino‐1‐propyl)‐bis(4‐nitrobenzene‐1,2‐diolato)silicate (4a), and (N,N‐diethyl‐3‐amino‐1‐propyl)‐bis(4‐nitrobenzene‐1,2‐diolato)silicate (4b) as well as potassium bis(4‐nitrobenzene‐1,2‐diolato)borate (5) has been studied in a set of … Show more

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Cited by 11 publications
(9 citation statements)
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“…8c) have also been used for the construction of functional solids, including nanotubular stacks. 96 Likewise, arylspiroboronate esters have also found limited use in the generation of radical molecular magnets, 97 thermal stabilizers and plasticizers, 98 ionic chromophores, 99 and in the cross-linking of gelled fluids. 100…”
Section: Methodsmentioning
confidence: 99%
“…8c) have also been used for the construction of functional solids, including nanotubular stacks. 96 Likewise, arylspiroboronate esters have also found limited use in the generation of radical molecular magnets, 97 thermal stabilizers and plasticizers, 98 ionic chromophores, 99 and in the cross-linking of gelled fluids. 100…”
Section: Methodsmentioning
confidence: 99%
“…Systematic studies on the solvatochromism of catechol derivatives are still lacking in spite of the importance of the catechol moiety in naturally occurring dyes. So far, 4‐nitrocatechol and its silicon complexes and a phenolate betaine dye were only studied …”
Section: Introductionmentioning
confidence: 99%
“…We think that ion-pair effects of the sodium cation and hydrogen bonding to the twice negatively charged silicate with water are useful as explanation. Those ion pairing effects on UV/Vis absorption were already discussed in [7]. Methanol is a stronger hydrogen-bonding acceptor (β ϭ 0.66) [14] or donor solvent which interacts stronger with the sodium cation, whereas water is a stronger hydrogen-bonding donor (Ͱ ϭ 1.17) [14] or acceptor solvent which interacts stronger with the hexacoordinate silicate.…”
Section: Effect Of Quencher Concentration On Fluorescencementioning
confidence: 91%
“…With the aim to investigate chromophoric catechol derivatives and their penta-and hexacoordinate silicates [7], in this article we report about the fluorophore 4-methylesculetin (6,7-dihydroxy-4-methylcoumarin, 4-ME).…”
Section: Introductionmentioning
confidence: 99%