2023
DOI: 10.1039/d3dt00597f
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Effect of methoxy substituents on fluorescent Zn2+/Cd2+ selectivity of bisquinoline derivatives with a N,N′-dimethylalkanediamine skeleton

Abstract: BQDMEN (N,N’-bis(2-quinolylmethyl)-N,N’-dimethylethylenediamine) and its 6-methoxyquinoline derivative (6-MeOBQDMEN) are fluorescent Zn2+ sensors with minor response to Cd2+ (IZn/ICd = 3.9 for BQDMEN and IZn/ICd = 2.2 for 6-MeOBQDMEN in the presence...

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Cited by 9 publications
(14 citation statements)
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“…The Cd 2+ complex with 7 crystallized as a bis(μ-chloro)dinuclear complex (Figure a). A similar dicadmium complex with tetradentate ligand BQDMEN ( N , N ′-bis(2-quinolylmethyl)- N , N ′-dimethylethylenediamine) has been reported . Although this ethylenediamine complex exhibited apparent interligand stacking interaction between quinoline moieties in the bis(μ-chloro)dicadmium complex, no such interquinoline interaction was detected in the present complex, probably due to the steric constraints in the N , N -bis(2-quinolylmethyl)amine structure.…”
Section: Resultsmentioning
confidence: 94%
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“…The Cd 2+ complex with 7 crystallized as a bis(μ-chloro)dinuclear complex (Figure a). A similar dicadmium complex with tetradentate ligand BQDMEN ( N , N ′-bis(2-quinolylmethyl)- N , N ′-dimethylethylenediamine) has been reported . Although this ethylenediamine complex exhibited apparent interligand stacking interaction between quinoline moieties in the bis(μ-chloro)dicadmium complex, no such interquinoline interaction was detected in the present complex, probably due to the steric constraints in the N , N -bis(2-quinolylmethyl)amine structure.…”
Section: Resultsmentioning
confidence: 94%
“…The methoxy substitution on the quinoline ring increases the metal binding affinity by the electron-donating effect and often affords fluorescent Cd 2+ selectivity. 27,34,35,43 So, we prepared 6-MeOBPDTQ (2) and TriMeOBPDTQ (3) and examined their fluorescence responses with metal ions. Changes in UV−vis spectra, including those for BPDTQ (1), are shown in Figure S6.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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