Article
Spectroscopy
Linlin Wang, Jayasmita Jana, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: Low-cost nitrogen and boron-doped carbon nanodots (CPAP-CDs) with high quantum yield were synthesized through a facile hydrothermal treatment. These CPAP-CDs showed wide absorption, strong fluorescence, and pH-dependent behavior, making them suitable for detecting nitrite ions. The method had a low detection limit, wide linear detection range, and was successfully applied to different water samples testing.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Yafeng Deng, Jun Qian, Yihua Zhou, Yifan Niu
Summary: The blue-green fluorescent carbon dots (CDs) synthesized in this study showed high sensitivity and selectivity for detecting nitrites, with a low detection limit of 0.03 mM in water. The sulfuric acid group and aromatic primary ammonia groups on the surfaces of CDs interacted with nitrites to cause fluorescence quenching, providing a new way of monitoring nitrites in target samples.
Article
Chemistry, Analytical
Lijuan Zhang, Meina Shi, Wenjuan Zhou, Weijiang Guan, Chao Lu
Summary: High-efficiency chemiluminescence (CL) resonance energy transfer (CRET) can be achieved by shortening the donor-acceptor distance and/or improving the luminescence efficiency of CRET acceptors. The AIE-active fluorophore adsorbed on the surface of LDHs exhibited high-efficiency luminescence, while LDHs can further adsorb ONOO-. The proposed CL system successfully detected NaNO2 in a concentration range from 1.0 to 100 mu M.
ANALYTICAL CHEMISTRY
(2021)
Article
Biochemical Research Methods
Xiping Mei, Dongxiu Wang, Songbai Wang, Junfen Li, Chuan Dong
Summary: In this study, fluorescent carbon dots (CDs) doped with N and S atoms were successfully synthesized, exhibiting dual emission fluorescence at two separate wavelengths. The interaction between Cr (VI) ions and CDs led to a decrease in fluorescence at one wavelength and an increase at the other. This property allowed for the visualization detection of Cr (VI) in water samples. Additionally, the CDs were applied as fluorescent probes for cell imaging with dual emission fluorescence.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
J. Yang, Q. Cheng, C. C. Zhu, H. Y. Huang, J. B. Su, W. Ni, B. Ruan, N. Ma, F. C. Tsai
Summary: Folate receptor is a common biomarker for the early diagnosis of cancer. In this study, folic acid was co-conjugated with carbon dots (FA-CDs) to achieve fluorescence imaging of tumor cells. The stability of FA-CDs was improved by using metalorganic framework material as the host material. The resulting FA-CDs@UiO-66-NH2 composite material showed excellent stability and anti-interference capability in complex environments. Additionally, it exhibited low toxicity in both normal cells and tumor cells, and successfully achieved fluorescence imaging in RAW cells and COS-7 cells.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Applied
Bo Peng, Chunjuan Wang, Xueyan He, Yongjun Ma, Min Zhou, Xin Ma, Shengguo Zhao, Yanjun Fang
Summary: A triple-mode colorimetric and fluorescent sensing scheme based on manganese dioxide nanoparticles (MnO2NPs) and carbon quantum dots (CQDs) was developed for nitrite determination. The proposed methods, including UV-vis detection mode and fluorescent detection mode using a smartphone-based measurement, showed accurate and convenient detection of nitrite in food and water samples. The results were validated with the AOAC standard spectrophotometric method.
Article
Materials Science, Multidisciplinary
Naixin Li, Fang Lei, Dandan Xu, Yong Li, Jinliang Liu, Ying Shi
Summary: In this study, nitrogen and phosphorus co-doped carbon dots were prepared using a solvothermal synthesis strategy, resulting in improved electronic properties and tunable luminescence. The prepared carbon dots showed excitation-dependent emission in the blue region and excitation-independent emission in the orange region, with a high quantum yield of 47%. The N, P-CDs were found to be non-toxic to cells and suitable for cell imaging applications, suggesting their potential as excellent bioimaging probes.
Article
Chemistry, Physical
Shahina Riaz, Firoz Khan, Z. A. Raza, Rajesh Theravalappil, Masoud Al-Rasheidi, Nadir Abbas
Summary: Researchers have developed a novel quantum dot-sensitized all-weather solar cell that can generate energy during both day and night. The cell uses nitrogen and sulfur doping to improve charge injection efficiency and utilizes a long persistence phosphor to store unabsorbed light and excite the quantum dots at night.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Analytical
Aikun Liu, Haojie Cai, Yutian Zeng, Yu Chen, Xiantong Yu, Jun Song, Pengju Zeng, Junle Qu, Jiaqing Guo, Hao Li
Summary: In this study, nitrogen-doped carbon dots were synthesized using a one-step hydrothermal method, and it was demonstrated that they can serve as a fluorescence indicator for monitoring HS-. Moreover, the carbon dots can also be used as a probe for fluorescence imaging in living cells.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Yuting Liu, Di Zhong, Lei Yu, Yanfeng Shi, Yuanhong Xu
Summary: Small molecular dyes have limitations in terms of biological toxicity and fluorescence photobleaching for bacterial imaging. Carbon dots, with their low cost, negligible toxicity, and anti-photobleaching properties, show potential for bio-imaging. This study utilizes primary amine functionalized carbon dots to achieve imaging of dead or alive bacterial cells due to their small size, excellent quantum yield, and primary amine functional groups.
Article
Nanoscience & Nanotechnology
Shenna Chen, Yunping Hao, Ronghui Li, Yanxu Liu, Jinxia Li, Lina Geng
Summary: Recently, nitrogen-doped carbon dots (N-CDs) with high fluorescence intensity were synthesized and characterized. These N-CDs showed remarkable fluorescence properties and photostability, making them suitable for the detection of Hg2+ and glutathione (GSH). Furthermore, the N-CDs exhibited pH-sensitive behavior and could also be used for H+ detection. The outstanding performance of N-CDs suggests their potential applications in ecological pollution and biomolecule visualization monitoring.
Article
Chemistry, Analytical
Li Zhang, Zihan Wang, Huiping Wang, Wenjuan Dong, Yang Liu, Qin Hu, Shaomin Shuang, Chuan Dong, Xiaojuan Gong
Summary: Carbon dots are promising for cellular imaging, with N-doped CDs showing great potential for nucleolus-orientation imaging due to their excellent fluorescence properties and biocompatibility. Their ability to specifically bind to RNA in nucleoli enhances fluorescence, making them suitable for wash-free imaging techniques.
Article
Chemistry, Analytical
Chenfang Miao, Xin Zhou, Xiaoyang Huang, Jiyue Huang, Yanping Chen, Yuebin Liu, Xiaomu Hu, Lingjun Zeng, Shaohuang Weng, Huixing Chen
Summary: In this study, silicon-doped green carbon dots (Si-CDs) with high quantum yield and rich epoxypropyl were synthesized and used as probes for the sensitive detection of tyrosinase (TYR). Si-CDs exhibited intrinsic lysosomal targeting ability and could be used for real-time monitoring of lysosomes.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Yujie Shen, Mingcong Rong, Xiaodan Qu, Bolin Zhao, Jinhui Zou, Zhenbang Liu, Yu Bao, Ying He, Siyi Li, Xiaojin Wang, Meiyun Chen, Kaiying Chen, Yuwei Zhang, Li Niu
Summary: Detection of heavy metal ions in water is an important topic in the field of analytical chemistry and environmental science. In this study, a novel strategy for determining the total content of heavy metal ions in water using fluorescence spectroscopy was developed. Fluorescent nitrogen, sulfur co-doped carbon quantum dots were prepared and showed a wide linear response to a series of water-soluble metal ions. The N, S-CQDs were also found to effectively remove heavy metal ions from water.
Article
Chemistry, Analytical
Yen-Linh Thi Ngo, Phi Luan Nguyen, Jayasmita Jana, Won Mook Choi, Jin Suk Chung, Seung Hyun Hur
Summary: A new strategy for sensing hydrogen peroxide (H2O2) and glucose using metal oxide-carbon dot hybrid structure was investigated. The sensing system showed high accuracy in detecting H2O2 and glucose and could be applied for on-site analysis of glucose without the use of a spectrometer.
ANALYTICA CHIMICA ACTA
(2021)
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)