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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Su, Bei Ya Ling, Xun-li Liu, Lang Wang, Li-ya Feng, Xun Song, Hong-liang Ng, Seik-weng |
| Description | Author Affiliation: Feng X ( College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471022, P. R. China.) |
| Abstract | Reactions of lanthanide(III) nitrates with multi-donor carboxylate ligand in the presence of oxalate anion afforded four new lanthanide coordination polymers with three dimensional (3D) frameworks, namely, $\{[Ln_{2}(DPPA)_{2}(μ_{2}-C_{2}O_{4})(H_{2}O)_{2}]·2H_{2}O\}_{n}$ (Ln = Nd (1), Sm (2)) and $[Ln_{2}(HDPPA)_{2}(DPPA)_{2}]_{n}$ (Ln = Tb (3), Yb (4)), $(H_{3}DPPA$ = 3-(4-hydroxyl pyridinium-1-yl) phthalic acid and $H_{2}C_{2}O_{4}$ = oxalic acid ). Compounds 1 and 2 are isostructural and isomorphous, featuring oxalate pillared binodal (4,5)-connected porous 3D framework with intersected 1D channels, in which the coordinated and lattice waters are accommodated. The complexes 3 and 4 are also isostructural, but featuring a (4,6)-connected 3D network based on a rectangular window composed of $\{Ln(HDPPA)\}^{+}$ extended anion chains, further interlinked by DPPA. The Tb(III) analogue exhibits intense characteristic green photoluminescence employing DPPA as an antenna. While Sm(III) compound 2 mainly involves ligand -to- ligand charge transfer. Variable-temperature susceptibility analyses of complexes 1 (Nd), 2 (Sm) and 3 (Tb) revealed that depopulation of the Stark levels together with weak antiferromagnetic interactions between the lanthanide ions lead to a continuous decrease in $χ_{M}T$ when the samples are cooled from 300 to 2 K. |
| ISSN | 14779226 |
| Issue Number | 28 |
| Journal | Dalton Trans. |
| Volume Number | 42 |
| e-ISSN | 13645447 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 2013-07-28 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Subscribed |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Inorganic Chemistry |
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