Controlling dimensionality via a dual ligand strategy in Ln-thiophene-2,5-dicarboxylic acid-terpyridine coordination polymers

Autor(es)

Carter, Korey P. ^[1] ; Zulato, Cecilia H. F. ^{[2, 1]} ; Rodrigues, Emille M. ^[2] ; Pope, Simon J. A. ^[3] ; Sigoli, Fernando A. ^[2] ; Cahill, Christopher L. ^[1]

Afiliação do(s) autor(es)

^[1] George Washington Univ, Dept Chem, Washington, DC 20052 - USA

^[2] Univ Estadual Campinas, UNICAMP, Inst Chem, Lab Funct Mat, BR-13083970 Campinas, SP - Brazil

^[3] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam - Wales

• Tipo de documento: Artigo Científico
• Fonte: DALTON TRANSACTIONS; v. 44, n. 36, p. 15843-15854, 2015.
• Citações Web of Science: 19

Resumo

Eleven new lanthanide (Ln = Nd-Lu)-thiophene-2,5-dicarboxylic acid (25-TDC)-2,2':6',2 `'-terpyridine (terpy) coordination polymers (1-11) which employ a dual ligand strategy have been synthesized hydrothermally and structurally characterized by single crystal and powder X-ray diffraction. Two additional members of the series (12 and 13) were made with Ce3+ and Pr3+ and characterized via powder X-ray diffraction only. The series is comprised of three similar structures wherein differences due to the lanthanide contraction manifest in Ln(3+) coordination number as well as the number of bound and solvent water molecules within the crystal lattice. Structure type I (Ce3+-Sm3+) contains two nine-coordinate Ln(3+) metal centers each with a bound water molecule. Structure type II (Eu3+-Ho3+) features a nine and an eight coordinate Ln(3+) metal along with one bound and one solvent water molecule. Structure type III (Er3+-Lu3+) includes two eight-coordinate Ln(3+) metal centers with both water molecules residing in the lattice. Assembly into supramolecular 3D networks via p-p interactions is observed for all three structure types, whereas structure types II and III also feature hydrogen-bonding interactions via the well-known C-H center dot center dot center dot O and O-H center dot center dot center dot O synthons. Visible and near-IR luminescence studies were performed on compounds 1, 2, 10, and 13 at room temperature. As a result characteristic near-IR luminescent bands of Pr3+, Nd3+, Sm3+, and Yb3+ as well as visible bands of Sm3+ were observed. (AU)

• Processo FAPESP: 09/54066-7 - Laboratório Multiusuário de Espectroscopia Óptica Avançada
• Beneficiário: Yoshitaka Gushikem
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários