journal

Luminescence: the Journal of Biological and Chemical Luminescence

journal
https://read.qxmd.com/read/32207236/preparation-and-optical-parameter-characterization-of-two-aldehyde-derivative-thin-films-for-photonic-applications-by-drop-casting-method
#1
Raveendra Melavanki, S Vaijayanthimala, Basappa Chanabasappa Yallur, Vikas M Shelar, Diksha Singh, Kishor Kumar Sadasivuni, N R Patil
In this study, thin films of polymer poly(methyl methacrylate) were prepared using a drop casting method. Two newly synthesized aldehyde derivatives, 2-bromomalonaldehyde and 5,6-dihydroimidazo[2,1-b]thiazole-2-carbaldehyde, were used at different concentrations to dope the films. The prepared films were transparent and therefore studied for application in photonics. Optical characterization of the samples was carried out using different spectroscopy techniques. Absorption spectra for both samples were obtained using a UV-vis light spectrophotometer...
March 23, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32202368/hydrothermal-synthesis-of-carbon-dots-and-their-application-for-detection-of-chlorogenic-acid
#2
Zhu Han, Li He, Shuang Pan, Hui Liu, Xiaoli Hu
A novel and sensitive fluorescence analysis platform was constructed for the detection of chlorogenic acid (CGA) using carbon dots (C-dots) with prominent sensitivity and selectivity. Excitation-dependent emission fluorescence C-dots were fabricated using citric acid and l-histidine as precursors through an efficient one-step hydrothermal treatment. The maximum excitation and emission wavelength of the as-synthesized C-dots were 340 nm and 414 nm, respectively. Moreover, the as-prepared C-dots displayed excellent water solubility and good photostability...
March 23, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32198843/highly-fluorescent-carbon-dots-from-wheat-bran-as-a-novel-drug-delivery-system-for-bacterial-inhibition
#3
Titto Sunil John, Pradeep Kumar Yadav, Devendra Kumar, Sushil Kumar Singh, Syed Hadi Hasan
In this study, we prepared carbon dots (CDs) from wheat bran via hydrothermal treatment at 180°C for 3 h. The prepared CDs showed blue-green fluorescence under UV light. The fluorescence emission study of the CDs revealed that they showed maximum fluorescence emission at 500 nm. The prepared CDs showed a high quantum yield of 33.23%. Solvent-dependent fluorescence emission analysis of the CDs was performed to study the variation in fluorescence emission characteristics with solvent polarity. The prepared CDs were conjugated with amoxicillin (AMX) to explore its potential for use as a drug delivery agent for AMX...
March 20, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32196947/synthesis-photophysical-properties-and-density-functional-theory-studies-of-phenothiazine-festooned-vinylcyclohexenyl-malononitrile
#4
Fatimah A M Al-Zahrani, Khalid Ahmed Alzahrani, Reda M El-Shishtawy, Khloud Abu Mellah, Amerah M Al-Soliemy, Abdullah M Asiri
A novel phenothiazine derivative conjugated with vinylcyclohexenyl-malononitrile (PTZ-CDN) was synthesized through the Knoevenagel reaction of 10-octyl-10H-phenothiazine-3,7-dicarbaldehyde with 2-(3,5,5-trimethylcyclohex-2-en-1-ylidene)-malononitrile and fully characterized. The UV-vis absorption spectra of PTZ-CDN in different solvents showed a λmax band at 497-531 nm with a high molar extinction coefficient attributed to intramolecular charge transfer (ICT) with the characteristics of a π-π* transition...
March 20, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32196908/luminescence-study-on-mn-ni-co-doped-zinc-sulfide-nanocrystals
#5
Vikas Lahariya, Meera Ramrakhiani
Zinc sulfide (ZnS) doped with transition metal has been used as phosphor for various optoelectronic applications. In the present report, ZnS:Mn doped and ZnS:Mn,Ni co-doped were prepared using chemical co-precipitation method using polyvinyl pyrolidone as a surfactant. The structural studies were carried out using an X-ray diffraction technique; optical studies have been performed using ultraviolet-visible light absorption and photoluminescence (PL) spectroscopy. The presences of functional groups were confirmed using Fourier transform infrared spectroscopy...
March 20, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32173991/a-highly-sensitive-fluorescence-sensor-based-on-lucigenin-chitosan-sio-2-composite-nanoparticles-for-microrna-detection-using-magnetic-separation
#6
Zheng Chang, Jing Feng, Xingwang Zheng
In this paper, a convenient reverse-phase microemulsion method for the synthesis of SiO2 nanoparticles (NPs) by simply introducing the chitosan and fluorescent dye of lucigenin during the formation reaction of SiO2 NPs was proposed. Addition of chitosan can make the SiO2 NPs porous, and increases lucigenin molecule incorporation into chitosan/SiO2 NPs nanopores based on electrostatic interaction and supermolecular forces. Therefore, fluorescence quantum yield of the lucigenin/chitosan/SiO2 composite nanoparticles was increased by introduction of chitosan and compared with lucigenin/SiO2 NPs without chitosan...
March 15, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32168404/preparation-and-characterization-of-selenium-decorated-graphene-quantum-dots-with-high-afterglow-for-application-in-photodynamic-therapy
#7
M Roeinfard, M Zahedifar, M Darroudi, A Khorsand Zak, E Sadeghi
Graphene quantum dots (GQDs) was synthesized using a simple, rapid and affordable method and decorated with selenium at different molar ratios for the first time to obtain an efficient sample for use in photodynamic therapy. Surface modification of GQDs was carried out using polyethylene glycol (PEG) for conjugation with protoporphyrin IX (PpIX). Synthesized GQDs (Se: 0.3%) at 180°C had an emission spectrum that fairly coincided with the absorption profile of PpIX. A relative decrease of about 62.48% in the emission intensity of anthracene was recorded under illumination with UVC light in the presence of GQDs (Se: 0...
March 13, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32160413/surface-enhanced-raman-spectroscopy-for-on-site-analysis-a-review-of-recent-developments
#8
REVIEW
Ji Sun, Lin Gong, Wenjun Wang, Zhengjun Gong, Dongmei Wang, Meikun Fan
On-site identification and quantification of chemicals is critical for promoting food safety, human health, homeland security risk assessment, and disease diagnosis. Surface-enhanced Raman spectroscopy (SERS) has been widely considered as a promising method for on-site analysis due to the advantages of nondestructive, abundant molecular information, and outstanding sensitivity. However, SERS for on-site application has been restricted not only by the cost, performance, and portability of portable Raman instruments, but also by the sampling ability and signal enhancing performance of the SERS substrates...
March 11, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32160380/-turn-on-fluorescence-sensing-of-hydrogen-peroxide-in-marine-food-samples-using-a-carbon-dots-mno-2-probe
#9
Keke Ning, Guoqiang Xiang, Cuicui Wang, Feihong Huang, Jinzhi Liu, Lanlan Zhang, Minmin Yan, Bingqian Hu, Wen Lei
A 'turn-on' fluorescence method for detection of hydrogen peroxide (H2 O2 ) in marine food samples is presented in this article. Using this method, a carbon dots (CDs)-MnO2 probe was formed in which fluorescence intensity (FI) of CDs was quenched through fluorescence resonance energy transfer by addition of MnO2 nanosheets. When H2 O2 was added into the CDs-MnO2 solution, the MnO2 nanosheets formed Mn2+ ions due to a redox reaction between H2 O2 and MnO2 nanosheets, and CD FI was recovered. Under optimized conditions, the detection limit for H2 O2 was 0...
March 11, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32150663/a-simple-and-sensitive-flow-injection-chemiluminescence-immunoassay-for-chloramphenicol-based-on-gold-nanoparticle-loaded-enzyme
#10
Liegao Luo, Xinchun Zhou, Yanting Pan, Kang Zhao, Anping Deng, Jianguo Li
A simple and ultrasensitive flow injection chemiluminescence competitive immunoassay based on gold nanoparticle-loaded enzyme for the detection of chloramphenicol (CAP) residues in shrimp and honey has been developed. Due to their good biocompatibility and large specific surface area, carboxylic resin beads can be used as solid phase carriers to immobilize more coating antigens (Ag). In addition, gold nanoparticles could provide an effective matrix for loading more CAP antibody and horseradish peroxidase, which would effectively catalyze the system of luminol-p-iodophenol (PIP)-H2 O2 ...
March 9, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32145137/study-of-the-migration-behaviours-of-imidazoline-corrosion-inhibitor-in-concrete-using-uv-vis-spectrophotometry
#11
Zhijie Zhao, Chen Zhang, Jingmao Zhao, Vahdat Zahedi Asl, Wei Wang, ShiXiong Wei, Muhammad Junaid Anjuma
In this study, UV-visible light spectrophotometry was used for the first time to examine the migration behaviours of cationic and nonionic imidazoline corrosion inhibitors in concrete. Imidazoline can react with bromocresol purple resulting in a reduction in absorbance, which can be used to calculate quantitatively imidazoline concentration. The results showed that the migration rate of nonionic imidazoline was faster than that of cationic imidazoline with or without the presence of an electric field, possibly because of the better water solubility of nonionic imidazoline...
March 7, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32142218/green-synthesis-of-fluorescent-carbon-dots-using-chloroplast-dispersions-as-precursors-and-application-for-fe-3-ion-sensing
#12
Yong Ran, Shaoyu Wang, Qianye Yin, Aoli Wen, Xiaoxiao Peng, Yunfei Long, Shu Chen
Water-soluble carbon dots (CDs) were synthesized using a one-step hydrothermal treatment of chloroplast dispersions extracted from fresh leaves as a green carbon source. The CD solution showed an emission peak centred at 445 nm when excited at 300 nm. The synthesized CDs were uniform and monodispersed with an average size of 5.6 nm. When adding ferric(III) ions (Fe3+ ) to the solution of the original CDs, the fluorescence intensity decreased significantly. Based on the linear relationship between fluorescence intensity and concentration of Fe3+ ions, an effective method for rapid, sensitive and selective Fe3+ sensing in aqueous solution could be established...
March 6, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32142207/quantum-chemical-computations-and-photophysical-spectral-features-studies-of-two-coumarin-compounds
#13
Kalpana Sharma, Raveendra Melavanki, Kishor Kumar Sadasivuni
An attempt was made to determine the ground state and excited state dipole moments and quantum chemical computations of two coumarin compounds, namely 3-hydroxy-3-[2-oxo-2-(2-oxo-2H-chromen-3-yl)-ethyl]-1,3-dihydro-indol-2-one (3HOCE) and 3-[2-(8-methoxy-2-oxo-2H-chromen-3-yl)-2-oxo-ethylidene]-1,3-dihydro-indol-2-one (3MOCE). Both compounds displayed a red shift with enhancement in solvent polarity. The larger excited state dipole moment indicated the more polar nature of the selected compounds in the excited state than in the ground state...
March 6, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32119755/two-life-prediction-models-for-optoelectronic-displays-without-conventional-life-tests
#14
Jianping Zhang, Siyi Chen, Yu Zong, WenBin Li, Helen Wu
To precisely predict the life of optoelectronic displays over a short time, two life prediction models were established based on the three-parameter Weibull right approximation method (TPWRAM). In Model I, the acceleration life under each stress was obtained using TPWRAM, the data points formed by acceleration life and acceleration stress were, respectively, fitted by three extrapolation functions and the optimal extrapolation function was determined by comparing the fitting determination coefficient and root-mean-square error...
March 2, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32112588/luminescence-characterization-of-kbapo-4-re-re-sm-3-eu-3-dy-3-phosphors
#15
S K Ramteke, A N Yerpude, S J Dhoble, N S Kokode
KBaPO4 luminescent powdered phosphors doped with rare earth elements (RE = Sm3+ ,Eu3+ ,Dy3+ ) were successfully synthesized using a wet chemical method to identify the most suitable phosphor for solid-state lighting based on the measurement of their emission spectra at excitation wavelengths. The X-ray diffraction pattern of the as-prepared KBaPO4 was well matched with its standard JCPDS file no. 330996, indicating the formation of the desired compound. Scanning electron microscopy images revealed irregular morphology, the material crystallized particles aggregated and were non-uniform with particle sizes ranging from 1 to 100 μm...
February 29, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32064758/recent-advances-in-fluorescence-sensors-based-on-dna-mof-hybrids
#16
REVIEW
Fen Wu, Jianhan Ye, Yulu Cao, Ziyuan Wang, Tingting Miao, Qian Shi
In this review, the recent advances in the development of fluorescence sensors based on DNA and metal-organic framework hybrids have been reported for nucleic acid, metal ion and amino acid detection. The main detection mechanism depends on different adsorption capacities of MOFs towards different DNA structures (single-stranded DNA, double-stranded DNA), and consequently the fluorescence intensity of probe DNA is changed. These results might open up a way to study their potential application in material science and clinical diagnosis of some related diseases...
February 16, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32030872/photoluminescence-emission-from-nanostructured-porous-preparations-of-cds-zntio-3-assembled-nanoparticles
#17
E Campos-González, G Gonzalez de la Cruz, P Rodriguez-Fragoso, Y E Bravo-García, R Castanedo-Pérez, G Torres-Delgado, O Zelaya-Angel
This study reports the structural and optical properties of CdS/ZnTiO3 nanocomposites prepared using a chemical bath and different titanate concentrations. Commercial ZnTiO3 nanoparticles were introduced into a chemical bath that had been used to produce CdS semiconductor nanoparticles (NPs). Here, the growing CdS crystallites precipitated onto the suspended zinc titanate NPs. X-ray diffraction patterns revealed that samples of CdS/ZnTiO3 nanopowders were made of cubic ZnTiO3 and hexagonal CdS wurtzite. The morphology of the particles was studied using transmission electron microscopy and scanning electron microscopy images...
February 6, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32026588/use-of-eosin-for-green-spectroscopic-determination-of-mebendazole
#18
Aya Roshdy, Heba Elmansi, Shereen Shalan, Amina Elbrashy
New, sensitive, and reliable spectroscopic methods were constructed for the fast determination of the anthelmintic drug mebendazole. The methods depended on the reaction of the amino group in mebendazole with eosin in acidic medium forming an ion pair complex. The first method, Method I, relied on quenching of the native fluorescence of eosin after reaction with mebendazole at pH 3.7 using acetate buffer. Fluorescence quenching was measured at 538 nm after excitation at 518 nm. This method showed a linear response over the concentration range 5...
February 5, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32017392/analysis-of-thermoluminescence-characteristics-of-a-lithium-disilicate-glass-ceramic-using-a-nonlinear-autoregressive-with-exogenous-input-model
#19
Esme Işik, Hüseyin Toktamiş, İbrahim Işik
Dental ceramics because of their translucency exemplify the most biologically realistic restorative materials for aesthetic rehabilitation and can be used to estimate dose accumulated as a result of a nuclear accident or attack. In this study, lithium disilicate ceramic obtained from Vivadent Ivoclar, Turkey was studied for its thermoluminescence (TL) properties. The lithium disilicate glass ceramic was irradiated with a 90 Sr-90 Y β-source from 10 Gy to 6.9 kGy and the results read on a Harshaw 3500 reader...
February 3, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
https://read.qxmd.com/read/32017383/stopped-flow-chemiluminescence-determination-of-the-anticancer-drug-capecitabine-application-in-pharmaceutical-analysis-and-drug-delivery-systems
#20
Jalal Niazi Saei, Ali Mokhtari, Hossein Karimian
Capecitabine is a chemotherapeutic agent used for the treatment of patients with metastatic cancers. This study aimed at determining the drug capecitabine in a simple chemiluminescence (CL) system of acidic potassium permanganate using the stopped-flow injection technique. Statistical methods were used to detect optimum conditions. The method showed two linear calibration ranges from 6.7 × 10-6 to 6.7 × 10-5 mol L-1 and from 6.7 × 10-5 to 2.7 × 10-3 mol L-1 with a detection limit of 1.5 × 10-6 mol L-1 ...
February 3, 2020: Luminescence: the Journal of Biological and Chemical Luminescence
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