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Tunable ultraviolet to deep blue light emission from sulfur nanodots fabricated by a controllable fission-aggregation strategy

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Science China Materials 2022年第10期65卷 2786-2792页

作者： Lian Xiao Quanchao Du Yi Huang Shijia Cheng Shuai Yin Teck Neng Wong edwin kok lee yeow Handong Sun Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Research Institute of Aero-Engine Beihang UniversityBeijing 100083China School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore MajuLab International Joint Research Unit UMI 3654CNRSUniversitéCôte d’AzurSorbonne UniversitéNational University of SingaporeNanyang Technological UniversitySingapore 637371Singapore

Bright tunable light emission in the short wavelength range from sulfur nanodots was demonstrated with a photoluminescence quantum yield(PLQY)of up to 59.4%.A fission-aggregation mechanism was proposed for the formation of sulfur nanodots with desired *** synthetic strategy allowed for simultaneous size control from 3.2 to 5.6 nm,thus tuning the emission color from ultraviolet(UV)to deep blue(342±430 nm),and for the suppression of unwanted nonradiative recombination centers and deep level *** luminescence mechanism and quantum confinement effect of the synthesized sulfur nanodots were investigated by optical spectroscopy and theoretical *** results show promise toward the application of sulfur nanodots in UV optoelectronics,biomedical treatments,and sterilization.

关键词： sulfur nanodots ultraviolet deep blue tunable photoluminescence heavy metal free high PLQY

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Mesogenic Schiff Base Ethers with Heterocyclic Benzothiazole Core: Synthesis and Phase Transitions Studies

Mesogenic Schiff Base Ethers with Heterocyclic Benzothiazole...

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2012 4th International Conference on Chemical,Biological and Environmental Engineering

作者： Sie-Tiong Ha kok-leei Foo Guan-yeow Yeap Siew-Ling lee Faculty of Science Universiti Tunku Abdul RahmanJln UniversitiBandar Barat31900 KamparPerakMalaysia Centre for Biodiversity Research Universiti Tunku Abdul RahmanJln UniversitiBandar Barat31900 KamparPerakMalaysia Liquid Crystal Research Laboratory School of Chemical SciencesUniversiti Sains Malaysia11800 MindenPenangMalaysia Ibnu Sina Institute for Fundamental Science Studies Universiti Teknologi Malaysia81310 UTM SkudaiJohorMalaysia

A homologous series of new liquid crystals,6-ethoxy-2-(4-alkyloxybenzylidenamino) benzothiazoles,consisting of benzothiazole core,Schiff base and ether linkers was *** the members can be differed by the number of carbon atoms at terminal alkyloxy *** molecular structure of title compound was confirmed with infrared and nuclear magnetic resonance spectroscopic *** properties were studied using differential scanning calorimetry and polarizing optical *** liquid crystal phases were present throughout the series.

关键词： Benzothiazole,Schiff Base,Ether Linker,Nematic,Smectic

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Single-molecule spectroscopy reveals new and exciting insights into polymer science

Single-molecule spectroscopy reveals new and exciting insigh...

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第三届亚洲光谱会议

作者： Wuguo Bi edwin K.L.yeow Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University

＜正＞Single-molecule tracking via wide-field microscopy（WFM）has commonly been used to track,in real-time,important processes occurring in biological and inorganic ***,the use of WFM to study important phenomena in polymer science has not been fully explored or *** this presentation,I will show how WFM is utilized to

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Disease Progression, Response to ACEI/ATRA Therapy and Influence of ACE Gene in IgA Nephritis

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Cellular & Molecular Immunology 2007年第3期4卷 227-232页

作者： Keng-Thye Woo yeow-kok Lau Yi Zhao Fang-E Liu Hwee-Boon Tan Eng-Keng Tan Fook-Chong Stephanie Choong-Meng Chan kok-Seng Wong Department of Renal Medicine Singapore General Hospital Singapore Clinical Research Singapore General Hospital Singapore Department of Paediatrics The 2nd Hospital Shandong University Jinan Shandong China

Various studies have shown that angiotensin-converting enzyme （ACE） gene insertion/deletion （ID） polymorphism may play a role in the progression to end stage renal failure （ESRF） in patients with IgA nephritis （IgAN）. In this randomized controlled trial, patients were followed up for 5 years to determine their long-term renal outcome to ACEI/ATRA therapy and to ascertain if their ACE gene profile could play a role in determining their response to therapy. Seventy-five patients with IgAN were enlisted. Thirty-seven were on ACEI/ATRA therapy for 62 ± 5 months and thirty-eight were untreated and served as controls. All patients had their ACE gene ID polymorphism genotyped. Compared to controls, treated patients had lower serum creatinine （p 〈 0.001）, lower proteinuria （p 〈 0.002） and fewer numbers progressing to ESRF （p 〈 0.002）. Among patients with genotype II, there were less ESRF in the treatment group when compared to the untreated control group （p 〈 0.02）. The advantage of therapy was not seen in patients with ID or DD genotypes. ACEI/ATRA therapy was found to be effective in retarding disease progression in IgAN with years to ESRF significantly extended in patients at all levels of renal function, including patients whose outcome were ESRF. Genotyping showed better response to therapy only for those with genotype Ⅱ. The common mechanism is probably through lower levels of ACE, glomerular pressure and proteinuria resulting in reduced renal damage and retardation of progression to ESRF. Cellular ＆ Molecular Immunology.

关键词： ACE gene ID polymorphism ACEI/ATRA therapy end-stage renal failure

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