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Structure and sensitized near-infrared luminescence of Yb(III) complexes with sulfonylamidophosphate type ligand

Paper ID Volume ID Publish Year Pages File Format Full-Text
27548 44030 2011 9 PDF Available
Title
Structure and sensitized near-infrared luminescence of Yb(III) complexes with sulfonylamidophosphate type ligand
Abstract

A series of new lanthanide complexes with dimethyl(phenylsulfonyl)amidophosphate (HSP) was synthesized ({Na[Ln(SP)4]}n (Ln1), [Ln(SP)3phen] (Ln2) and [Ln(SP)3bpy]·H2O (Ln3) (where Ln = GdIII, ErIII, YbIII and LuIII; phen = 1,10-phenantroline; and bpy = 2,2′-bipyridine) and the crystal structures of [Er(SP)3phen] and [Yb(SP)3bpy]·H2O were resolved. Absorption (at 295, 4 K), emission (at 295, 77, 4 K) and IR (at 295 K) spectra as well as luminescence decay time measurements were used to characterize the photophysical properties of single crystals. Effective energy transfer from a [SP]− ligand to the YbIII ion was demonstrated despite a large energy gap ΔE=Etrip−E2F5/2ΔE=Etrip−E2F5/2. Replacing one molecule of the [SP]− ligand with the phen or bpy molecule caused reduction of the emission decay time from 35 μs for Yb1 to 20 and 15.5 μs for Yb2 and Yb3, respectively at the temperature of 295 K. Using the absorption spectra τrad (1.1 ms—Yb1, 943 μs—Yb2 and 914 μs—Yb3) and QLnLn (3.14%—Yb1, 2.19%—Yb2, 1.64%—Yb3) were estimated. On the basis of low temperature, high-resolution absorption and luminescence spectra, the ligand-field splittings of the excited and ground states of YbIII complexes were determined.

Keywords
Sulfonyl phosphoramides; Ytterbium chelates; Near-infrared luminescence; Energy transfer; Crystal structure
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Structure and sensitized near-infrared luminescence of Yb(III) complexes with sulfonylamidophosphate type ligand
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 217, Issue 1, 1 January 2011, Pages 1–9
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us