Article
Chemistry, Physical
Yunchun Li, Wanxia Jia, Zhouping Yang, Jun Yang, Yinyin Chen, Jianqing Yang, Wei Zhang, Changfang Lu, Xianxiang Wang
Summary: In this study, sulfur quantum dot (COS-S QDs) nanozyme with excellent fluorescence and peroxidase activity was successfully synthesized with the assistance of chitosan oligosaccharide. The concentration of MoO42- was accurately detected by the changes in fluorescence intensity and absorbance, and satisfactory results were obtained for its determination in toiletries and cigarettes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Chin-Wei Cheng, Kuan-Min Lo, Min-Feng Li, Tai-Chia Chiu, Cho-Chun Hu
Summary: The study developed a facile method for synthesizing dual-emission carbon nanodots through electrolysis. These CDs exhibited potential for detecting mercury ions, glyphosate, and HCQ in environmental water, cereals, and urine samples.
Article
Chemistry, Inorganic & Nuclear
Shuang Ding, Ying Gao, Binshan Ni, Xiaodong Yang
Summary: This study reports the environmentally friendly synthesis of Carbon Quantum Dots (CQDs) using various typical crop biomasses as carbon sources. The resulting CQDs exhibit strong fluorescence and good dispersion in water, making them suitable as fluorescent probes for the selective and sensitive detection of Fe3+ ions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
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
Nanoscience & Nanotechnology
Sachin Kadian, Narendra Chaulagain, Naveen Narasimhachar Joshi, Kazi M. Alam, Kai Cui, Karthik Shankar, Gaurav Manik, Roger J. Narayan
Summary: A new type of heavy-metal free single-element nanomaterial, sulfur quantum dots (SQDs), has attracted significant attention for its advantages in biomedical and optoelectronic applications. A novel optimized synthesis strategy using probe sonication and heating is proposed, which reduces the reaction time from 125 hours to 15 minutes. The as-synthesized SQDs exhibit excellent aqueous solubility, photostability, and a high photoluminescence quantum yield without any post-treatment, and show excitation-dependent emission and stability in different pH and temperature environments.
Article
Food Science & Technology
Seungjae Min, Ruchir Priyadarshi, Parya Ezati, Jong-Whan Rhim, Jun Tae Kim
Summary: A chitosan-based multifunctional coating solution with sulfur quantum dots (SQDs) was developed to protect enoki mushrooms from L. monocytogenes infection. The SQD-added films exhibited excellent UV-blocking properties and improved mechanical stability without altering the water vapor transmission characteristics. Antioxidant and antimicrobial activities were significantly increased, and the chitosan/SQD3% coating solution effectively prevented Listeria contamination and eliminated bacterial colonies within 6 days.
FOOD PACKAGING AND SHELF LIFE
(2023)
Article
Chemistry, Analytical
Amidou Tall, Francisco Antonio Cunha, Boukare Kabore, Cintya D'Angeles do E. S. Barbosa, Ueslen Rocha, Tasso O. Sales, Marilia O. Fonseca Goulart, Issa Tapsoba, Josue Carinhanha Caldas Santos
Summary: In this study, nitrogen and phosphorus-doped carbon dots (N, P-CDs) were prepared through one-pot hydrothermal synthesis and showed high sensitivity and selectivity in detecting Cr(VI). The synthesized N, P-CDs were successfully applied to monitor Cr(VI) in environmental samples, demonstrating their potential for use in environmental monitoring applications.
MICROCHEMICAL JOURNAL
(2021)
Article
Optics
Yiheng Song, Linxu Dong, Jiangkai Bao, Yang Hu, Ru Song, Zhuqun Shi, Quanling Yang, Chuanxi Xiong
Summary: This study reports a method for the preparation of sulfur-doped carbon dots at lower temperatures using excess sodium hydroxide. The method offers advantages such as rapid reaction rate, high quantum yield, low toxicity, and excellent solubility.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Ruey-Shin Juang, Chien-Te Hsieh, Chih-Peng Kao, Yasser Ashraf Gandomi, Chun-Chieh Fu, Shou-Hsuan Liu, Siyong Gu
Summary: Highly fluorescent boron-doped graphene quantum dots were synthesized with green and red emission capabilities; By adjusting the concentration of B-dopant, the quantum yield of fluorescence reached high levels.
Article
Chemistry, Multidisciplinary
Xin Jia, Chang-Ling Yin, Jing Li, Juan-Rong Li, Bao-Li An, Jiaqiang Xu
Summary: Bright yellow-green carbon quantum dots (YGCDs) with high luminescent absolute quantum yield were successfully synthesized using a simple and efficient hydrothermal method. The synthesis time was significantly reduced by using tin oxide nanoparticles as a catalyst. Moreover, YGCDs can serve as a promising fluorescent probe for selectively quenching folic acid molecules.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Analytical
Jiashuai Gu, Ting Han, Xiangdong Peng, Hong Kang, Lijie Dong
Summary: A highly sensitive fluorescent probe based on PAA-functionalized QDs was developed for the rapid detection of MG. By utilizing the fluorescence resonance energy transfer mechanism, the fluorescence of QDs@PAA can be linearly quenched by MG, and fluorescent test strips were prepared using inkjet printing technology, enabling rapid visual detection within 10 seconds.
Article
Biochemistry & Molecular Biology
Wenchao Zhu, Shiori Takeuchi, Shosei Imai, Tohru Terada, Takumi Ueda, Yusuke Nasu, Takuya Terai, Robert E. Campbell
Summary: Molecular fluorescent indicators based on chemigenetic combination of synthetic ion-recognition motifs and protein-based fluorophores are versatile tools for dynamic imaging of biological systems. This design enables the development of chemigenetic indicators with ion or molecular specificities that have not been realized with fully protein-based indicators.
NATURE CHEMICAL BIOLOGY
(2023)
Article
Biochemical Research Methods
Ying Zhang, Peiyuan Li, Hongjun Yan, Qing Guo, Qiuting Xu, Wei Su
Summary: In this study, green carbon quantum dots with good water solubility were prepared from the renewable resource Curcuma zedoaria by a hydrothermal method. The carbon dots exhibited stable photoluminescence at different pH values and high NaCl concentrations, making them suitable for various applications even under harsh conditions. They showed potential as fluorescence probes for the sensitive and selective detection of Fe3+ ions, and also demonstrated high photostability, low cytotoxicity, good hemolytic activity, and protective effects against photooxidative damage. These results highlight the multiple potential applications of carbon quantum dots obtained from medicinal herb sources in sensing, bioimaging, and disease diagnosis.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
P. Keerthana, Anila Rose Cherian, Uraiwan Sirimahachai, Ditto Abraham Thadathil, Anitha Varghese, Gurumurthy Hegde
Summary: In this study, a fluorescence sensor based on carbon quantum dots was developed for the rapid and selective detection of picric acid in industrial effluents. By boron functionalization of N-CQDs, B/N-CQDs were synthesized and demonstrated to exhibit excellent performance in detecting picric acid.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Biochemistry & Molecular Biology
Biswajit Roy, Meg Shieh, Geat Ramush, Ming Xian
Summary: This review summarizes the development and design of organelle-targeted fluorescent sulfane sulfur probes, which are used to detect sulfane sulfurs in subcellular organelles. The low endogenous concentrations and instabilities of sulfane sulfurs in biological systems pose challenges for their detection. The article examines the strategies and choices of fluorophores for organelle-targeted probes, discusses their mechanisms and ability to detect endogenous and exogenous sulfane sulfur species, and presents the advantages and limitations of the probes. Future research directions are also proposed.
Article
Chemistry, Analytical
Michel Rocha Baqueta, Augusto Cesar Costa-Santos, Ana Paula Rebellato, Gisele Marcondes Luz, Juliana Azevedo Lima Pallone, Federico Marini, Alexsandro Lara Teixeira, Douglas N. Rutledge, Patricia Valderrama
Summary: This study reports the essential element composition of new Brazilian Canephora coffees and applies chemometric tools for analysis. The results demonstrate the suitability of this method for origin and species discrimination based on the inorganic fraction of coffee.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mengjie Li, Jiapeng Wang, You Zhou, Yang Chen, Lingying Xia
Summary: A novel photoelectrochemical biosensor based on gold nanoparticles and specific structures was developed for highly sensitive detection of mercury ion. The multiple sandwich structures hindered electron supply and light harvesting, resulting in a weakened PEC signal, while the specific structures extinguished the PEC signal, enabling quantitative detection of Hg2+. The sensor exhibited high selectivity and stability, with potential applications in environmental detection, biological analysis, and medical research.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mohamed A. Korany, Rasha M. Youssef, Marwa A. A. Ragab, Mostafa A. Afify
Summary: A stability-indicating fit-for-purpose method was developed for the determination of HC, TL, and PS in syrup dosage form. The method successfully separated CL from THY and quantified the analytes using HPLC-DAD. The robustness of the method was assessed through statistical analysis and self-validation.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Lingling Lin, Minyu Li, Ping Li, Chenqing Ye, Huanglong Zhuang, Shaohuang Weng, Feng Chen
Summary: This study developed a highly sensitive and selective electrochemical sensor for simultaneous detection of dopamine and uric acid. The sensor exhibited excellent anti-interference and stability, and could accurately measure dopamine and uric acid in human urine samples.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Peifang Chen, Caiyun Jiang, Zhouping Wang, Hong-zhen Lian, Xiaoyuan Ma
Summary: In this study, a high-performance SERS-active aptasensor was successfully developed for the quantitative analysis of AFB1 in cereal grains, which is of great significance in the field of food safety.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
E. Abas, C. Marina-Montes, C. Perez-Marin, J. Puimedon, J. Anzano
Summary: This study conducted a comprehensive measurement of natural and anthropogenic radionuclides in soil, water, and air in different locations around Deception Island in Antarctica. The results revealed significant levels of 210Pb and anthropogenic 137Cs in soil samples near old human settlements and facilities, as well as detectable levels of 137Cs and 60Co in water samples from old hunting areas. The findings also suggested potential resuspension processes based on higher-than-expected air quality results.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Joao Franciso Allochio, Nayara A. dos Santos, Nathalia dos S. Conceicao, Clara S. D. Baptista, Keyller B. Borges, Valdemar Lacerda Jr, Wanderson Roma
Summary: This study developed a fiber spray ionization mass spectrometry (FSI-MS) method, which shows great potential in detecting illicit drugs. Compared with paper spray ionization mass spectrometry (PSI-MS), FSI-MS demonstrates higher sensitivity in COC detection.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Dina A. Ahmed, Ola G. Hussein, Mamdouh R. Rezk, Mohamed Abdelkawy, Yasmin Rostom
Summary: The main goal of this study was to develop two green chromatographic techniques, HPLC and TLC, for the determination of alcaftadine (ALF) in pharmaceutical formulation and biological samples. The developed HPLC technique showed high efficiency and minimal environmental impact, successfully identifying ALF in the presence of its degradate. The TLC method provided a stability indicating study for ALF and was determined to be safe, green, and eco-friendly.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Yifan Zhang, Tong Zhang, Wenjing Ba, Li Liu, Yuan Rao, Xiaodan Zhang, Hanhan Zhang, Xiu Jin
Summary: This paper proposes a novel spectral transfer modelling method based on neural network architecture searching for the asymptomatic prediction of Akizuki pear cork spot disorder. The experiments show that the model by this method is more effective, achieving an accuracy of 82.61%.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Krzysztof Greda, Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: For the first time, a dispersive micro-solid phase extraction (D-mu SPE) based on graphene oxide was used for the ultrasensitive determination of Cd. With this method, Cd can be efficiently extracted from a mixture of alkali and alkaline earth metals without the need for an elution step. The combination of D-mu SPE and SAGD OES significantly reduces matrix effects and improves the tolerance of Cd to alkali metals. The method shows simplicity in the measurement system and the commercially available nanosorbent used.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
P. K. Fathima Anjila, G. R. Tharani, Anand Sundaramoorthy, Venkat Kumar Shanmugam, Karthikeyan Subramani, Shanmugavel Chinnathambi, Ganesh N. Pandian, Vimala Raghavan, Andrews Nirmala Grace, Singaravelu Ganesan, Mangaiyarkarasi Rajendiran
Summary: This work proposes a rapid and sensitive spectroscopic method for detecting melamine in food products using rare-earth Terbium-doped Graphene Quantum Dots (Tb-GQDs) synthesized by microwave and simple chemical conjugation methods. The synthesized Tb-GQDs show a spherical shape with a size of approximately 6 nm and a quantum yield of 52%. The maximum detection limit for melamine concentration in milk and milk products is found to be 0.31 μM. The dual emitting Tb-GQDs provide a sensitive and effective platform for real-time detection of melamine in food samples, particularly in milk, and show promising potential in the food industry.
MICROCHEMICAL JOURNAL
(2024)
Review
Chemistry, Analytical
Piyush Dey, Mandeep Kaur, Akhil Khajuria, Dilmeet Kaur, Manpreet Singh, Hema Kumari Alajangi, Neha Singla, Gurpal Singh, Ravi Pratap Barnwal
Summary: Environmental issues, such as the uncontrolled release of dangerous pollutants, have significant impacts on human health. Traditional methods for detecting pollutants require specialized personnel and equipment, but nanotechnology has improved the performance of biosensors. This article discusses the use of nanotechnology in pollutant detection and the associated techniques.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Sa Dong, Qiuyun Shi, Lingjun Guan, Yulong Wang, Pengyan Liu, Cunzheng Zhang, Jianguo Feng
Summary: In this study, a highly sensitive indirect competitive chemiluminescence enzyme immunoassay (icCLEIA) method was developed for the determination of sodium pentachlorophenolate (PCP-Na) and its metabolite pentachlorophenol (PCP). The method showed high specificity and affinity with a detection limit of 0.0032 ng/mL for PCP-Na and 0.0192 ng/mL for PCP. The method had no cross reaction with other chlorophenols compounds except for PCP. The average recoveries in chicken, pork and fish samples were 81.3-105.8% with low coefficient of variation (CV).
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Palaniappan Ilayaraja, Murugan Manivannan, Paramasivam Parthiban
Summary: Nirmatrelvir, an antiviral drug used for the treatment of COVID-19, has been recommended by the World Health Organization. We developed an optimized analytical method for the quantification of Nirmatrelvir and its products, with high sensitivity and a wide linear range. The method also meets the requirements for greenness evaluation.
MICROCHEMICAL JOURNAL
(2024)