title: Self-assembly versus stepwise synthesis: heterometal-organic frameworks based on metalloligands with tunable luminescence properties.
abstract: A new family of heterometal-organic frameworks has been prepared by two synthesis strategies, in which IFMC-26 and IFMC-27 are constructed by self-assembly and IFMC-28 is obtained by stepwise synthesis based on the metalloligand (IFMC=Institute of Functional Material Chemistry). IFMC-26 is a (3,6)-connected net and IFMC-27 is a (4,8)-connected 3D framework. The metalloligands {Ni(H4 L)}(NO3 )2 are connected by binuclear lanthanide clusters giving rise to a 2D sheet structure in IFMC-28. Notably, IFMC-26-Eux Tby and IFMC-28-Eux Tby have been obtained by changing the molar ratios of raw materials. Owing to the porosity of IFMC-26, Tb(3+) @IFMC-26-Eu and Eu(3+) @IFMC-26-Tb are obtained by postencapsulating Tb(III) and Eu(III) ions into the pores, respectively. Tunable luminescence in metal-organic frameworks is achieved by the two kinds of doping methods. In particular, the quantum yields of heterometal-organic frameworks are apparently enhanced by postencapsulation of Ln(III) ions.
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, PR China.
authors.forename: Shu-Ran
authors.initials: SR
authors.lastname: Zhang
authors.forename: Dong-Ying
authors.initials: DY
authors.lastname: Du
authors.forename: Ke
authors.initials: K
authors.lastname: Tan
authors.forename: Jun-Sheng
authors.initials: JS
authors.lastname: Qin
authors.forename: Hui-Qing
authors.initials: HQ
authors.lastname: Dong
authors.forename: Shun-Li
authors.initials: SL
authors.lastname: Li
authors.forename: Wen-Wen
authors.initials: WW
authors.lastname: He
authors.forename: Ya-Qian
authors.initials: YQ
authors.lastname: Lan
authors.forename: Ping
authors.initials: P
authors.lastname: Shen
authors.forename: Zhong-Min
authors.initials: ZM
authors.lastname: Su
mesh_terms: D018360:Crystallography, X-Ray; D005063:Europium / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity; D011789:Quantum Theory; D013050:Spectrometry, Fluorescence; D013725:Terbium / Q000737:chemistry
chemical_list: D007477:Ions; D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; D013725:Terbium; D005063:Europium
keywords: luminescence; metal-organic frameworks; metalloligands; self-assembly; stepwise synthesis