Long-lived NIR emission in sulfur-doped zeolites due to the presence of [S3]2-clusters

被引:1
作者
Viola, Catarina [1 ,2 ]
Laia, Cesar A. T. [1 ]
Outis, Mani [1 ]
Ferreira, Luis F. V. [3 ,4 ]
Alves, Luis C. [5 ]
Teixeira, Miguel [6 ]
Folgosa, Filipe [6 ]
Lima, Joao C. [1 ]
Ruivo, Andreia [2 ]
Avo, Joao [3 ,4 ]
机构
[1] Univ NOVA Lisboa, NOVA Sch Sci & Technol, Dept Chem, LAQV REQUIMTE,FCT NOVA, P-2829516 Caparica, Portugal
[2] Univ NOVA Lisboa, NOVA Sch Sci & Technol, VICARTE, Vidro & Ceram Artes,FCT NOVA, P-2829516 Caparica, Portugal
[3] Univ Lisbon, BSIRG iBB Inst Bioengn & Biosci, Inst Hlth & Bioecon, Inst Super Tecn, P-1049001 Lisbon, Portugal
[4] Univ Lisbon, Inst Hlth & Bioecon, Associate Lab I4HB, Inst Super Tecn, P-1049001 Lisbon, Portugal
[5] C2TN Campus Tecnol & Nucl, IST UL, Estr Nacl 10, P-2695066 Bobadela, Portugal
[6] Univ Nova Lisboa, Inst Tecnol Quim & Biol Antonio Xavier, Av Republ, P-2781901 Oeiras, Portugal
关键词
Luminescent materials; Chalcogen-doped zeolites; Near-infrared luminescence; Optical spectroscopy; Time-resolved spectroscopy; RAMAN-SPECTRA; SODALITE; PHOTOLUMINESCENCE; RADICALS; CENTERS; GLASSES; CAGES;
D O I
10.1016/j.mtchem.2023.101514
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The exploration of novel long-lived near-infrared (NIR) luminescent materials has attracted significant attention due to their applications in optical communications, anticounterfeiting, and bioimaging. However, these materials usually present low photoluminescence quantum yields and low photo-and chemical stability. Novel emitters that overcome these limitations are in demand. In this study, NIR emission was achieved using widely available, sustainable, and non-toxic materials through the synthesis of sulfur-doped zeolites, with different S/Cl ratios. With a combination of computational calculations (TD-DFT) and spectroscopic data, this emission was assigned to the radiative decay of excited triplet states of [S3]2-clusters, which resulted in a remarkably high Stokes shift (1.97 eV, 440 nm) and an average decay time of 0.54 ms. These new materials present high stability, external quantum efficiency of up to 17%, and a long-lived NIR emission, placing these compounds in a unique position to be used in appli-cations demanding NIR emitters.(c) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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页数:9
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