In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 18 ( 2023), p. 6008-6018
Kurzfassung:
Five new lanthanide metal–organic frameworks (Ln-MOFs), namely {[Ln(L)]·Cl} n , [Ln = Pr(1), Nd(2), Eu(3), Ho(4), Ce(5)], based on a benzimidazole carboxylic acid ligand [H 2 L = 2-(2-carboxyphenyl)-1 H -benzo[d]imidazole-6-carboxylic acid] were synthesized by a solvothermal method. Ln-MOFs 1–5 have the same two-dimensional layered structures. Interestingly, 1–5 exhibit excellent adsorption performance to anionic dye Congo red (CR), with adsorption capacities of 2724 mg g −1 , 2719 mg g −1 , 2718 mg g −1 , 327 mg g −1 , and 2273 mg g −1 , respectively. Adsorption kinetics experiments showed that this kind of adsorption belonged to chemisorption; the hydrogen bonding and π–π interactions between the 1–5 host and CR guest molecules resulted in a high adsorption capacity. Luminescence and sensing experiments showed that 5 can be considered a promising multifunctional fluorescent sensor with good reusability and a high sensitivity toward Ag + and Hg 2+ ions, with detection limits of 1.7 × 10 −7 and 2.5 × 10 −6 M, respectively.
Materialart:
Online-Ressource
ISSN:
1477-9226
,
1477-9234
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
1472887-4
