resumo
A series of new lanthanide azelates [Ln(aze)(Haze)(H2O)]center dot H2O {Ln = La (1a), Ce (1b), Pr (1c); H2aze = azelaic acid}, [Ln(2)(aze)(3)(phen)(2)]center dot H2O [Ln = Nd (2a), Er (2b); phen = 1,10-phenanthroline], [Sm(aze)(Haze)(phen)]center dot 2H(2)O (3), [Gd(aze)(phen)(2)]center dot ClO4 (4) and (Hphen)[Tb-2(aze)(2)(phen)(4)]center dot 3ClO(4) (5) were hydrothermally prepared and structurally characterized.1a-c are isostructural and show 3-D framework based on 1-D infinite [Ln-O-Ln](n) chain. 2a-b exhibit sql layer, while 3 displays 1-D chain, where phen ligands locate at both sides of the chain. The Ln(3+) ions of 4 and 5 are connected by aze(2-) into two different types of rare cationic 1-D chains. The luminescent investigations show that both 2a and 2b exhibit interesting NIR luminescence and 5 displays a good potentiality as a luminescent sensor targeted for Fe3+ ion. Of particular interest, lanthanide azelates have not been to date documented, while this work presents the only examples of lanthanide azelates exhibiting luminescent properties. The magnetic properties of some lanthanide azelates were also investigated.
palavras-chave
METAL-ORGANIC FRAMEWORK; COORDINATION POLYMERS; FLUORESCENT-PROBE; WATER CLUSTERS; DISPLAYING 3; COMPLEXES; DICARBOXYLATES; CONTRACTION; COEXISTENCE; GADOLINIUM
categoria
Chemistry; Engineering; Materials Science
autores
Tan, ZW; Zhou, J; Jiang, TT; Zou, HH; Fu, LS
Grupos
agradecimentos
This work was supported by the NNSF of China (No. 21671029), the NSF of Chongqing (No. cstc2018jcyjAX0157), Program for leading talents of scientific and technological innovation in Chongqing (No. CSTCCXLJRC201707), and the Innovation Program for Chongqing's Overseas Returnees (No. cx2019037). This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Foundation for Science and Technology/MCTES.