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Lanthanide clusters with chalcogen encapsulated Ln: NIR emission from nanoscale NdSe(x).

Ln(SePh)3 (Ln = Ce, Pr, Nd) reacts with elemental Se in the presence of Na ions to give (py)16Ln17NaSe18(SePh)16, a spherical cluster with a 1 nm diameter. All three rare-earth metals form isostructural products. The molecular structure contains a central Ln ion surrounded by eight five-coordinate S... Full description

Journal Title: Journal of the American Chemical Society January 19, 2011, Vol.133(2), pp.373-378
Main Author: Moore, Brian F
Other Authors: Kumar, G Ajith , Tan, Mei-Chee , Kohl, Jesse , Riman, Richard E , Brik, Mikhail G , Emge, Thomas J , Brennan, John G
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1520-5126 ; DOI: 1520-5126 ; DOI: 10.1021/ja1069322
Link: http://search.proquest.com/docview/1122618934/?pq-origsite=primo
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title: Lanthanide clusters with chalcogen encapsulated Ln: NIR emission from nanoscale NdSe(x).
format: Article
creator:
  • Moore, Brian F
  • Kumar, G Ajith
  • Tan, Mei-Chee
  • Kohl, Jesse
  • Riman, Richard E
  • Brik, Mikhail G
  • Emge, Thomas J
  • Brennan, John G
subjects:
  • Lanthaniden
  • Cluster
  • Nahinfrarotspektroskopie
  • Emission
  • Neodym
  • Selenid
  • Morphologie
  • Natrium
  • Chemistry
ispartof: Journal of the American Chemical Society, January 19, 2011, Vol.133(2), pp.373-378
description: Ln(SePh)3 (Ln = Ce, Pr, Nd) reacts with elemental Se in the presence of Na ions to give (py)16Ln17NaSe18(SePh)16, a spherical cluster with a 1 nm diameter. All three rare-earth metals form isostructural products. The molecular structure contains a central Ln ion surrounded by eight five-coordinate Se2- that are then surrounded by a group of 16 Ln that define the cluster surface, with additional my3 and my5 Se2-, my3 and my4 SePh-, and pyridine donors saturating the vacant coordination sites of the surface Ln, and a Na ion coordinating to selenolates, a selenido, and pyridine ligands. NIR emission studies of the Nd compound reveal that this material has a 35% quantum efficiency, with four transitions from the excited state 4F3/2 ion to 4I9/2, 4I11/2, 4I13/2, and 4I15/2 states clearly evident. The presence of Na+ is key to the formation of these larger clusters, where reactions using identical concentrations of Nd(SePh)3 and Se with either Li or K led only to the isolation of (py)8Nd8Se6(SePh)12.
language: eng
source:
identifier: E-ISSN: 1520-5126 ; DOI: 1520-5126 ; DOI: 10.1021/ja1069322
fulltext: no_fulltext
issn:
  • 15205126
  • 1520-5126
url: Link


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titleLanthanide clusters with chalcogen encapsulated Ln: NIR emission from nanoscale NdSe(x).
creatorMoore, Brian F ; Kumar, G Ajith ; Tan, Mei-Chee ; Kohl, Jesse ; Riman, Richard E ; Brik, Mikhail G ; Emge, Thomas J ; Brennan, John G
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descriptionLn(SePh)3 (Ln = Ce, Pr, Nd) reacts with elemental Se in the presence of Na ions to give (py)16Ln17NaSe18(SePh)16, a spherical cluster with a 1 nm diameter. All three rare-earth metals form isostructural products. The molecular structure contains a central Ln ion surrounded by eight five-coordinate Se2- that are then surrounded by a group of 16 Ln that define the cluster surface, with additional my3 and my5 Se2-, my3 and my4 SePh-, and pyridine donors saturating the vacant coordination sites of the surface Ln, and a Na ion coordinating to selenolates, a selenido, and pyridine ligands. NIR emission studies of the Nd compound reveal that this material has a 35% quantum efficiency, with four transitions from the excited state 4F3/2 ion to 4I9/2, 4I11/2, 4I13/2, and 4I15/2 states clearly evident. The presence of Na+ is key to the formation of these larger clusters, where reactions using identical concentrations of Nd(SePh)3 and Se with either Li or K led only to the isolation of (py)8Nd8Se6(SePh)12.
subjectLanthaniden ; Cluster ; Nahinfrarotspektroskopie ; Emission ; Neodym ; Selenid ; Morphologie ; Natrium ; Chemistry;
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