Solvatochromic behavior of chiral mesoporous metal-organic frameworks and their applications for sensing small molecules and separating cationic dyes.
Two anionic metal-organic frameworks (MOFs) with 1D mesoporous tubes (1) and chiral mesoporous cages (2) have been rationally constructed by means of a predesigned size-extended hexatopic ligand, namely, 5,5',5''-(1,3,5-triazine-2,4,6-triyl)tris- (azanediyl)triisophthalate (TATAT). Charge neutrality is achieved by protonated dimethylamine cations. Notably, the two MOFs can be used to separate large molecules based on ionic selectivity rather than the size-exclusion effect so far reported in the literature. Owing to the imino triazine backbone and carboxyl groups of the hexatopic ligand, which provide important host-guest interactions, rare solvatochromic phenomena of 1 and 2 are observed on incorporating acetone and ethanol guests. Furthermore, guest-dependent luminescence properties of compound 2 were investigated, and the results show that luminescence intensity is significantly enhanced in toluene and benzene, while quenching effects are observed in acetone and ethanol. Thus, compound 2 may be a potential material for luminescent probes.
Department of Chemistry, Northeast Normal University, Institute of Functional Materials Chemistry, Key Laboratory of Polyoxometalate Science of Ministry of Education, Changchun, Jilin, 130024, PR China.
Chun-Yi
CY
Sun
Xin-Long
XL
Wang
Chao
C
Qin
Jun-Ling
JL
Jin
Zhong-Min
ZM
Su
Peng
P
Huang
Kui-Zhan
KZ
Shao
D002412:Cations / Q000737:chemistry / Q000302:isolation & purification; D005456:Fluorescent Dyes / Q000737:chemistry / Q000302:isolation & purification*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D016062:Porosity; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties
D002412:Cations; D005456:Fluorescent Dyes; D009942:Organometallic Compounds; D012997:Solvents