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Luminescence: the Journal of Biological and Chemical Luminescence

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https://www.readbyqxmd.com/read/28719145/preparation-of-carbon-dot-based-ratiometric-fluorescent-probes-for-cellular-imaging-from-curcuma-longa
#1
Zihnil Adha Islamy Mazrad, Eun Bi Kang, Insik In, Sung Young Park
This work derived biocompatible and stable probes based on fluorescent nanoparticles (FNPs) from a natural source, Curcuma longa. The multi-color fluorescence emissions from carbonized Curcuma longa (C-FNPs) obtained through defined dehydration conditions are soluble in water and have a small particle size (~17 nm). The surface passivation with polyethylene glycol (PEG) capped with amine groups in FNPs (P-FNPs) generated a probe with a higher quantum yield and longer fluorescence lifetime than obtained with C-FNPs...
July 18, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28718959/characterization-of-a-highly-al-3-selective-fluorescence-probe-based-on-naphthalimide-schiff-base-and-its-application-to-practical-water-samples
#2
Kesheng Shen, Shanshan Mao, Xinkui Shi, Fei Wang, Yuling Xu, Stephen Opeyemi Aderinto, Huilu Wu
A new fluorescent Al(3+) -probe, N-allyl-4-[3,3'-((2-aminoethyl)azanediyl)-bis(N´-(2-hydroxybenzylidene)propanehy-drazide)]-1,8-naphthalimide (L), was designed and synthesized based on 1,8-naphthalimide. The probe L contains 1,8-naphthalimide moiety as the fluorophore and a Schiff base as the recognition group. The structure of L was determined by single crystal X-ray. L emission at 526 nm increased on addition of Al(3+) under excitation wavelength at 350 nm. L exhibited high selectivity and sensitivity fluorescence emission towards to Al(3+) in ethanol/Tris-HCl buffer solution (1:1, v/v, pH = 7...
July 18, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28718955/an-electrochemiluminescent-method-for-glutamate-measurement-in-small-microdialysate-samples-in-asphyxiated-young-rats
#3
Jorge Ortega-Ibarra, Silvia López-Pérez, Alberto Morales-Villagrán
Glutamate (Glu) quantification has been performed by a combination of intracerebral microdialysis through which the samples are obtained and analyzed by high performance liquid chromatography (HPLC); its measurement requires a large expenditure of time (15-30 min per sample) and special training. Therefore, an alternative method is presented here, based on the electrochemiluminescence produced by the use of an enzymatic reactor, containing glutamate-oxidase, mixed and incubated with microdialysate from dorsal striatum (DS) and prefrontal cortex (PFC) of young rats asphyxiated during the neonatal period, under a global asphyxia model in order to test this method...
July 18, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28714253/an-off-on-off-type-fluorescent-probe-based-on-a-naphthalene-derivative-for-al-3-and-f-ions-and-its-biological-application
#4
Yanpeng Ren, Juan Han, Yun Wang, Xu Tang, Lei Wang, Liang Ni
A novel fluorescent probe-based naphthalene Schiff, 1-(C2-glucosyl-ylimino-methyl)-naphthalene-2-ol (L) was synthesized by coupling d-glucosamine hydrochloride with 2-hydroxy-1-naphthaldehyde. It exhibited excellent selectivity and highly sensitivity for Al(3+) in ethanol with a strong fluorescence response, while other common metal ions such as Pb(2+) , Mg(2+) , Cu(2+) , Co(2+) , Ni(2+) , Cd(2+) , Fe(2+) , Mn(2+) , Hg(2+) , Li(+) , Na(+) , K(+) , Fe(3+) , Cr(3+) , Zn(2+) , Ag(+) , Ba(2+) and Ca(2+) did not cause the same fluorescence response...
July 17, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28714204/investigation-on-the-ph-independent-photoluminescence-emission-from-carbon-dots-impregnated-on-polymer-matrix
#5
Pichan Saheeda, Kaviladath Sabira, Mohandas Dhaneesha, Sankaran Jayaleksmi
Highly luminescent, polymer nanocomposite films based on poly(vinyl alcohol) (PVA), and monodispersed carbon dots (C-dots) derived from multiwalled carbon nanotubes (MWCNTs), as coatings on substrates as well as free standing ones are obtained via solution-based techniques. The synthesized films exhibit pH-independent photoluminescence (PL) emission, which is an advantageous property compared with the pH-dependent photoluminescence intensity variations, generally observed for the C-dots dispersed in aqueous solution...
July 17, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28700141/zero-and-second-derivative-synchronous-fluorescence-spectroscopy-for-the-quantification-of-two-non-classical-%C3%AE-lactams-in-pharmaceutical-vials-application-to-stability-studies
#6
Eman S Elzanfaly, Rania M Youssif, Nahla N Salama, Ahmed S Fayed, Hassan A M Hendawy, Maissa Y Salem
The formation of metal chelates with various ligands may lead to the production of fluorescent chelates or enhance the fluorescence of the chelating agent. This paper describes two sensitive, selective and computer-solved methods, namely, zero order (SF) and second-derivative synchronous spectrofluorimetry (SDSFS) for nano-quantitation of two carbapenems; meropenem (MP) and ertapenem (EP). The methods are based on the chelation of MP with Tb(3+) and EP with Zr(4+) in buffered organic medium at pH 4.0 to produce fluorescent chelates...
July 12, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28685999/life-prediction-for-a-vacuum-fluorescent-display-based-on-two-improved-models-using-the-three-parameter-weibull-right-approximation-method
#7
Jianping Zhang, Xing Zhang, Yu Zong, Yaofang Pan, Helen Wu, Jieshuo Tang
To obtain precise life information for vacuum fluorescent displays (VFDs), luminance degradation data for VFDs were collected from a group of normal life tests. Instead of exponential function, the three-parameter Weibull right approximation method (TPWRAM) was applied to describe the luminance degradation path of optoelectronic products, and two improved models were established. One of these models calculated the average life by fitting average luminance degradation data, and the other model obtained VFD life by combining the approximation method with luminance degradation test data from each individual sample...
July 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28685961/a-novel-colorimetric-fluorescence-sensor-for-fe-3-based-on-quinoline-schiff-base
#8
Bin Li, Jianfei Tian, Dan Zhang, Fuli Tian
A novel fluorescent sensor bearing a quinoline and an anisidine moiety has been developed for highly selective detection of Fe(3+) , which shows photo-induced electron transfer (PET) behavior induced by Fe(3+) . Binding of Fe(3+) to the sensor induced the electron of C = N group transfer from quinoline to iron, the result exhibits fluorescent enhancement. With the features of easy synthesis, simple structural skeleton and excellent sensing ability, the newly synthesized chemosensor also applied as a highly selective fluorescent probe in complex samples containing various competitive metal ions...
July 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28685952/a-dual-discrimination-mode-for-improved-specificity-towards-let-7a-detection-via-a-single-base-mutated-padlock-probe-based-exponential-rolling-circle-amplification
#9
Ruixue Li, Yinan Wang, Pei Wang, Jianzhong Lu
MicroRNA (miRNA) family members are usually highly homologous sequences, and it is a challenging task to selectively detect one miRNA member from other family members in medical diagnosis. Here, we describe the design of a dual discrimination mode for improved specificity towards let-7a detection over the other members of the let-7 family, in which an intentional base mutation was introduced into the padlock probe of an exponential rolling circle amplification. The inherent discrimination power of the padlock probe and the introduced base mutation constituted a dual discrimination mode, which provided enhanced specificity for let-7a, even over single-base mismatched family sequences...
July 7, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28681566/design-and-synthesis-of-the-bodipy-bsa-complex-for-biological-applications
#10
Mani Vedamalai, Iti Gupta
A quinoxaline-functionalized styryl-BODIPY derivative (S1) was synthesized by microwave-assisted Knoevenagel condensation. It exhibited fluorescence enhancement upon micro-encapsulation into the hydrophobic cavity of bovine serum albumin (BSA). The S1-BSA complex was characterized systematically using ultraviolet (UV)-visible absorption, fluorescence emission, kinetics, circular dichroism and time-resolved lifetime measurements. The binding nature of BSA towards S1 was strong, and was found to be stable over a period of days...
July 6, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28681547/the-luminescence-properties-of-sr2-1-5x-1-5y-p2-o7-xdy-3-yce-3-phosphor-for-near-uv-based-white-leds-synthesized-by-a-chemical-co-precipitation-method
#11
Sha-Sha Liu, Da-Chuan Zhu, Jin-Shan Wang, Cong Zhao, Tao Han
A series of Sr2 P2 O7 :Dy(3+) , Sr2 P2 O7 :Ce(3+) and Sr2 P2 O7 :Dy(3+) ,Ce(3+) phosphors was synthesized via the one-step calcination process for the precursors prepared by co-precipitation methods. The phases, morphology, quantum efficiency and photoluminescence properties of the obtained phosphors were characterized systematically. These results show that the near-spherical particles prepared through calcining the precursors by means of ammonium dibasic phosphate co-precipitation (method 3) have the smallest particle size and strongest emission intensity among the three methods in the paper...
July 6, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28681525/selective-spectrofluorimetric-method-for-determination-of-lisinopril-in-pharmaceutical-preparations-and-in-presence-of-hydrochlorothiazide-application-to-content-uniformity-testing
#12
Sayed M Derayea, Khalid M Badr El-Din, Fatma F Mohammed
A novel sensitive and cost-effective spectrofluorimetric method has been developed and validated for determination of lisinopril (an angiotensin converting enzyme inhibitor) in its pure form and pharmaceutical preparations. The method is based on the reaction of the drug with ninhydrin and phenylacetaldehyde in buffered medium (pH 7.0) to form a highly fluorescent product measured at 460 nm after excitation at 390 nm. Different experimental parameters were optimized and calibration curve was constructed...
July 6, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28681513/enhanced-green-emissions-of-er-3-yb-3-co-doped-gd2-moo4-3-by-co-excited-up-conversion-processes
#13
Haoyue Hao, Hongyu Lu, Guanghong Ao, Yinglin Song, Yuxiao Wang, Xueru Zhang
Improving the emission from rare earth ions doped materials is of great importance to broaden their application in bio-imaging, photovoltaics and temperature sensing. The green emissions of Gd2 (MoO4 )3 :Er(3+) /Yb(3+) powder upon co-excitation with 980 and 808 nm lasers were investigated in this paper. Distinct enhancement of green emissions was observed compared with single laser excitation. Based on the energy level structure of Er(3+) , the enhancement mechanism was discussed. Moreover, the result of temperature-dependent enhancement revealed that the enhancement factor reached its maximum (2...
July 6, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28681472/-turn-on-fluorescent-chemosensors-based-on-naphthaldehyde-2-pyridinehydrazone-compounds-for-the-detection-of-zinc-ion-in-water-at-neutral-ph
#14
Yuanyuan Liu, Yuanyuan Li, Qi Feng, Na Li, Kai Li, Hongwei Hou, Bing Zhang
A series of naphthaldehyde-2-pyridinehydrazone derivatives were discovered to display interesting 'turn-on' fluorescence response to Zn(2+) in 99% water/DMSO (v/v) at pH 7.0. Mechanism study indicated that different substituent groups in the naphthaldehyde moiety exhibited significant influence on the detection of Zn(2+) . The electron rich group resulted in longer fluorescence wavelengths but smaller fluorescence enhancement for Zn(2+) . Among these compounds, 1 showed the highest fluorescence enhancement of 19-fold with the lowest detection limit of 0...
July 6, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28660707/fluorescence-sensing-of-dichlorvos-pesticide-by-the-luminescent-tb-iii-3-ally-salicylohydrazide-probe
#15
Ibrahim Ahmed Ibrahim, Abbas Mamdoh Abbas, Hatem Medhat Darwish
A fluorescent probe was developed and characterized, it consisted of terbium(III) with 3-ally-salicylohydrazide in ethanol, in which the 1:2 [Tb(3+) :S1 ] molar ratio was the best stoichiometric ratio for the probe. The ligand 3-ally-salicylohydrazide (S1 ) was synthesized, then was confirmed by IR, CHN, LC-MS and (1) H NMR. The sensitivity of the probe's fluorescence spectra towards the presence of eight organophosphorus pesticides in ethanolic solution was studied, in which the probe showed marked sensitivity towards dichlorvos pesticide...
June 29, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28653812/synthesis-and-luminescence-of-novel-near-infrared-emitting-bazrsi3-o9-cr-3-phosphors
#16
Xuanmin Wu, Dandan Xu, Wanwen Li, Ting Wang, Liwei Cao, JianXin Meng
The BaZrSi3 O9 :Cr(3+) phosphors were prepared by a high temperature solid state method. Their structures were confirmed with XRD and their luminescence properties were investigated. Under excitation at 455 nm, BaZrSi3 O9 :Cr(3+) phosphors exhibited a broad near infrared emission band peaked at 800 nm, which was assigned to the (4) T2 →(4) A2 transition of Cr(3+) . The near infrared emission intensity reached a maximum at Cr(3+) concentration of 0.7%. There was a concentration quenching phenomenon of Cr(3+) in BaZrSi3 O9 matrix and the corresponding concentration quenching mechanism was investigated...
June 27, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28653485/a-highly-sensitive-sensor-for-ethyl-acetate-by-changing-fluorescent-colour-of-lanthanide-complex
#17
Lina Zhao
A lanthanide complex, namely, [La2 (L-DBTA)3 (CH3 OH)2 (H2 O)2 ]∙2H2O has been synthesized using a simple reaction of L-O,O´-dibenzoyl tartaric acid with LaCl3 ∙6H2 O under ambient temperature. The luminescence spectrum in the solid state at room temperature revealed that the complex exhibited blue-light emission that originated from ligand. In addition, the lanthanide complex is developed as a fluorescent probe for sensing small molecules. Luminescence studies reveal that the lanthanide complex could detect ethyl acetate sensitively through fluorescence colour change from blue to yellow...
June 27, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28653412/a-selective-colorimetric-chemosensor-for-fe-3
#18
Min-Hsiu Kao, Chin-Feng Wan, An-Tai Wu
Two simple colorimetric receptors PS and PP (thiophene and pyridine appended derivative) were prepared and their cation sensing properties were investigated. Receptors PS and PP displayed a selective colorimetric change (from colorless to orange) upon binding to Fe(3+) in MeOH solution. The association constants for receptors PS-Fe(3+) and PP-Fe(3+) in MeOH were determined to be 1.15 × 10(6) and 4.31 × 10(6)  M(-1) , respectively, using Hill plots. The detection limits of PS and PP were 490.7 ppm and 393...
June 27, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28636187/dual-labeled-chemiluminescence-enzyme-immunoassay-for-simultaneous-measurement-of-total-prostate-specific-antigen-tpsa-and-free-prostate-specific-antigen-fpsa
#19
Lixia Zhao, Dan Wang, Gen Shi, Ling Lin
The specificity for early diagnostic of prostate-specific antigen (PSA) is low because the current technology mostly allows the detection of only one biomarker at one time. In this work, a dual-labeled chemiluminescence enzyme immunoassay (CLEIA) for simultaneous measurement of total PSA (TPSA) and free PSA (FPSA) was proposed. Anti-PSA McAb (Mab1) was immobilized on a microplate as the solid phase, horseradish peroxidase (HRP)-labeled anti-TPSA monoclonal antibody (McAb2) and alkaline phosphatase (ALP)-labeled anti-FPSA McAb3 were used as detection antibodies...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28636112/fluorescent-carbon-nanoparticles-obtained-from-charcoal-via-green-methods-and-their-application-for-sensing-fe-3-in-an-aqueous-medium
#20
Rajesh Patidar, Babulal Rebary, Dhruti A Sanghani, Gopala Ram Bhadu, Parimal Paul
Two green methods (microwave and hydrothermal) were employed for the preparation of water dispersible fluorescent carbon nanoparticles (CNPs) from activated charcoal. Microwave and hydrothermally synthesized carbon nanoparticles, (MW-CNPs) and (HT-CNPs), respectively were characterized by microscopic and spectroscopic techniques. A detailed study of their fluorescence characteristics was made. MW-CNPs and HT-CNPs were tested for metal ion selectivity in aqueous medium. MW-CNPs showed selectivity for Fe(3+) among the tested metal ions and important studies such as for interference, linear range and limit of detection were carried out...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
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