Two penta-RE encapsulated tetravacant Dawson selenotungstates [HN(CH)]H[SeORE(HO)(SeWO)]·40HO (RE = Dy (1), Gd (2)) were prepared by a one-step assembly strategy under bench conditions. Notably, the penta-RE-substituted [SeORE(HO)(SeWO)] polyoxoanion consists of two equivalent tetravacant Dawson [SeWO] fragments linked by a central penta-RE {SeORE(HO)} cluster through 16 lacunary oxygen atoms and four bridging oxygen atoms from two [SeWO] fragments. Furthermore, a series of cetyltrimethylammonium bromide (CTABr) encapsulated 1@CTA nanomaterials were prepared by the microwave method by controlling different reaction times and temperatures. The effects of time and temperature on the morphologies of 1@CTA nanomaterials were characterized by SEM images, and 1@CTA-5min prepared at 80 °C has a relatively uniform size of about 190 nm. Moreover, the photoluminescence properties of 1 and 1@CTA nanomaterials were investigated systematically, indicating that 1@CTA-5min prepared at 80 °C exhibits the strongest emission due to its smallest size and high dispersion. The energy transfer from the ST fragments to Dy ions in 1 and 1@CTA-5min were proved by time-resolved emission spectra (TRES) and the change in CIE coordinates with increasing time, and their energy transfer mechanism diagram was demonstrated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.inorgchem.9b00752 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Se-Rich Multinuclear Er-Containing Dawson-type Poly(selenotungstate).
Inorg Chem
November 2024
College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
A multinuclear Er-containing Dawson-type poly(selenotungstate) (poly(ST)) [HN(CH)]NaCsH [ErSeWO(HO)(SeWO)]·78HO () was made by the one-pot assembly with an excess SeO source in the reaction system. The polyoxoanion consists of an extremely rare ErSeWO(HO) ({ErSeW}) cluster core surrounded by six tetravacant Dawson-type SeWO ({SeW}) fragments, representing the most Se-containing Dawson-type structure so far. Notably, the {ErSeW} cluster exhibits an interesting trefoil-shaped configuration, formed by the condensation of a central ErSeO ({ErSe}) cage with three ErSeWO(HO) ({ErSeW}) clusters.
View Article and Find Full Text PDFControlled Assembly of a Dawson-like Antimoniotungstate-Supported Trefoil-type Trimer with Good Proton Conductivity Performance.
Inorg Chem
February 2024
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China.
With the excellent properties of POM in the field of proton conductivity, the preparation of POM-based proton-conductive materials has burst into life. Herein, an unprecedented Sb-templated all-inorganic trimer NaH[(SbWO)(SbWRuO)]·85HO (), which is based on tetravacant Dawson-like [SbWO] blocks and exhibits a trefoil type with D symmetry, has been successfully designed and synthesized by the assembly of simple materials with a one-pot hydrothermal method under acidic conditions. Also, compound is systematically characterized by single-crystal X-ray diffraction, PXRD, ESI-MS, IR spectroscopy, UV-vis, elemental analysis, and TGA.
View Article and Find Full Text PDFTwo unusual nanosized Nd-substituted selenotungstate aggregates simultaneously comprising lacunary Keggin and Dawson polyoxotungstate segments.
Nanoscale
August 2020
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Two unique nanosized Nd-substituted selenotungstates NaK{[WNd(HO)(NO)O](B-α-SeWO)(α-SeWO)}·35HO (1) and [HN(CH)]HNa{[WNd(HO)O(OH)(β-SeWO)][WNd(HO)O(B-α-SeWO)]}·84HO (2) were prepared by reacting NaSeO, NaWO·2HO with Nd(NO)·6HO in aqueous solution by controlling different cations and pH values. 1 was synthesized at pH = 4.3 in the presence of KCl, whereas 2 was synthesized at pH = 3.
View Article and Find Full Text PDFPreparations, Structures and Luminescence Properties of Penta-rare-earth Incorporated Tetravacant Dawson Selenotungstates and Their Ho /Tm Co-doped Derivatives.
Chem Asian J
April 2020
Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
A family of penta-rare-earth incorporated tetravacant Dawson selenotungstates [H N(CH ) ] H [SeO RE (H O) (Se W O ) ] ⋅ 40H O [RE=Ho (1), Er (2), Tm (3), Tb (4)] were synthesized. It should be noted that a penta-RE [SeO RE (H O) ] central core connecting two tetra-vacant Dawson-type [Se W O ] subunits generates a dimeric assembly of [SeO RE (H O) (Se W O ) ] in the structures of 1-4. Meanwhile, a class of Ho /Tm co-doped derivatives based on 1 with a Ho /Tm molar ratio of 0.
View Article and Find Full Text PDFTwo Penta-RE Encapsulated Tetravacant Dawson Selenotungstates and Nanoscale Derivatives and Their Luminescence Properties.
Inorg Chem
May 2019
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering , Henan University, Kaifeng , Henan 475004 , People's Republic of China.
Two penta-RE encapsulated tetravacant Dawson selenotungstates [HN(CH)]H[SeORE(HO)(SeWO)]·40HO (RE = Dy (1), Gd (2)) were prepared by a one-step assembly strategy under bench conditions. Notably, the penta-RE-substituted [SeORE(HO)(SeWO)] polyoxoanion consists of two equivalent tetravacant Dawson [SeWO] fragments linked by a central penta-RE {SeORE(HO)} cluster through 16 lacunary oxygen atoms and four bridging oxygen atoms from two [SeWO] fragments. Furthermore, a series of cetyltrimethylammonium bromide (CTABr) encapsulated 1@CTA nanomaterials were prepared by the microwave method by controlling different reaction times and temperatures.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!