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Long-Lived Afterglow from Elemental Sulfur Powder: Synergistic Effects of Impurity and Structure.

ABSTRACT: Elemental sulfur is not traditionally considered as an afterglow material, even though it can be endowed with fluorescence properties through processing it into nanodots. Herein, we discovered that elemental sulfur powder could emit room temperature phosphorescence (RTP) with a lifetime of 3.7 ms. A long-lived (>12 s) afterglow emission at 77 K could also be observed by the naked eye. Detailed investigations suggested that such a special phenomenon was attributed to impurity-related traps coupled with conduction and valence bands. After the sulfur is processed into nanodots, the rigid environment formed by the cross-linking of the surface ligands could stabilize the excited charges from quenching. This results in the promotion of RTP intensity and lifetime to achieve an emission lifetime of 200 ms. These results confirm the unique RTP of elemental sulfur powder, and also suggest the potential of sulfur-based materials as versatile components for the development of RTP materials.

SUBMITTER: Guo J

PROVIDER: S-EPMC9435047 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature

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Long-Lived Afterglow from Elemental Sulfur Powder: Synergistic Effects of Impurity and Structure.

Guo Jiaqi J Lu Zhangdi Z Li Chenmin C Miao Yuming Y Zhang Bingbing B Lam Jacky W Y JWY Shi Yu-E YE Wang Zhenguang Z Tang Ben Zhong BZ

ACS omega 20220820 34

Elemental sulfur is not traditionally considered as an afterglow material, even though it can be endowed with fluorescence properties through processing it into nanodots. Herein, we discovered that elemental sulfur powder could emit room temperature phosphorescence (RTP) with a lifetime of 3.7 ms. A long-lived (>12 s) afterglow emission at 77 K could also be observed by the naked eye. Detailed investigations suggested that such a special phenomenon was attributed to impurity-related traps couple ...[more]

PMID: 36061658

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Project description:Insights into the Metabolism of Elemental Sulfur by the Hyperthermophilic Archaeon Pyrococcus furiosus: Characterization of a Coenzyme A-Dependent NAD(P)H Sulfur Oxidoreductase The hyperthermophilic archaeon Pyrococcus furiosus, uses carbohydrates as a carbon source and produces acetate, CO2 and H2 as end products. When S° is added to a growing culture, within 10 min the rate of H2 production rapidly decreases and H2S is detected. After one hour cells contain high NADPH- and coenzyme A-dependent S° reduction activity (0.7 units/mg, 85°C) located in the cytoplasm. The enzyme responsible for this activity was purified to electrophoretic homogeneity (specific activity, 100 units/mg) and is termed NAD(P)H elemental sulfur oxidoreductase (NSR). NSR is a homodimeric flavoprotein (Mr 100 kDa) and is encoded by PF1186. This was previously assigned to an enzyme that reduces coenzyme A disulfide, which is a side-reaction of NSR. Whole genome DNA microarray and quantitative PCR analyses showed that the expression of NSR is up-regulated up to 7-fold within 10 min of S° addition. This primary response to S° also involves the up-regulation (> 16-fold) of a 13 gene cluster encoding a membrane-bound oxidoreductase (MBX). MBX is proposed replace the homologous 14 gene cluster that encodes the ferredoxin-oxidizing, H2-evolving membrane-bound hydrogenase (MBH), which is down-regulated >12-fold within 10 min of S° addition. Although an activity for MBX could not be demonstrated, it is proposed to conserve energy by oxidizing ferredoxin and reducing NADP, which is used by NSR to reduce S°. A secondary response to S° is observed 30 min after S° addition and includes the up-regulation of genes encoding proteins involved in amino acid biosynthesis and iron metabolism, as well as two so-called sulfur-induced proteins, termed SipA and SipB. This novel S°-reducing system involving NSR and MBX is so far unique to the heterotrophic Thermococcales, and is in contrast to the cytochrome- and quinone-based S°-reducing system in autotrophic archaea and bacteria. Keywords: time course, kinetic, sulfur metabolism, archaea, Pyrococcus furiosus, hyperthermophile

Dataset Information

Long-Lived Afterglow from Elemental Sulfur Powder: Synergistic Effects of Impurity and Structure.

Publications

Long-Lived Afterglow from Elemental Sulfur Powder: Synergistic Effects of Impurity and Structure.

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