RSC Advances
·
2015
·Vol. 5
·期 53
·42698-42704
·
IF 3.84
Xiaomin Fu,Jiahui Feng,Xingrong Tan,Qiyi Lu,Ruo Yuan,Shihong Chen
Graphite-like carbon nitride nanosheets/3,4,9,10-perylenetetracarboxylic acid hybrids (g-C3N4 NSs–PTCA) were synthesized via π–π conjugate action. Based on novel dual molecular specific recognition of oxyethyl groups to diol and carboxyl to amine groups, a signal-on electrochemiluminescence (ECL) sensor for dopamine (DA) was constructed utilizing g-C3N4 NSs–PTCA as asignal probe and K2S2O8 as a coreactant. Under the optimal conditions, the prepared ECL sensor presented a response to DA with a linear range from 6.0 pM to 30.0 nM. The detection limit (LOD) and limit of quantification (LOQ) of the sensor were 2.4 pM and 7.9 pM, respectively. The g-C3N4 NSs–PTCA signal probe coupling with a novel dual molecular recognition strategy would provide a promising ECL sensing platform for detecting DA sensitively and selectively.
研究领域:
分析化学
·
生物传感
·
分子识别
·
电化学
·
神经递质检测
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
He-Fang Wang,Ye-Yu Wu,Xiu-Ping Yan
A room-temperature phosphorescence (RTP) strategy was developed for direct, additive-free discrimination of catechol from resorcinol and hydroquinone based on sodium tripolyphosphate capped Mn-doped ZnS quantum dots (STPP-Mn-ZnS QDs). The RTP response of STPP-Mn-ZnS QDs to the three isomers was pH-dependent, and the greatest difference in the RTP response to the isomers was observed at pH 8.0: catechol enhanced the RTP intensity of the QDs, while resorcinol and hydroquinone had little effect on the RTP intensity of the QDs. The enhanced RTP intensity of 1 μM catechol was not affected by the coexistence of 30 μM resorcinol and 50 μM hydroquinone at pH 8.0. The detection limit of this RTP method was 53 nM catechol, and the precision was 3.2% (relative standard deviation) for five replicate detections of 1 μM catechol. The discrimination mechanism was ascribed to the weak bonded ligand of STPP-Mn-ZnS QDs and the different interaction between the three isomers and STPP-Mn-ZnS QDs. The strong binding of catechol to Zn resulted in the extraction of Zn from the surface of STPP-Mn-ZnS QDs and the generation of holes that were trapped by Mn2+ to form Mn3+. Catechol also promoted the reduction of Mn3+ into Mn2+ excited state, thus ultimately inducing the enhanced RTP response of STPP-Mn-ZnS QDs.
研究领域:
分析化学
·
纳米材料
·
发光传感器
·
环境监测
·
化学传感
✓ 已验证
DOI
高影响因子
ORGANOMETALLICS
·
2013
·
IF 4.145
Huili Chen,Xiaokai Li,Ruichun Bai,Yanbo Wu,Yingfang Fan,Jianbin Chao
A phosphorescent probe, Ir(ppy)2Cl(DMF) (Ir2), for cysteine (Cys) is reported. The recognition is based on the time-dependent emission of Ir2-Cys. Importantly, this probe can discriminate Cys rapidly from homocysteine (Hcy). Probe Ir2 displays a highly selective 72 nm of luminescent red-shift toward Cys within 30 min with an obvious emissive color change from green to orange. After 30 min, the emission band blue shifts gradually with an emissive change from orange to green. TDDFT combined with CV studies indicates that the different emission profile is ascribed to the different binding modes of Ir2 to Cys with time. The probe can be used to determine Cys in semiaqueous solution.
研究领域:
无机化学
·
分析化学
·
生物无机化学
·
发光传感器
·
分子探针
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2014
·
IF 5.825
Chenghua Zong,Li Rong Zheng,Wenhui He,Xiaoyan Ren,Chunhuan Jiang,Lehui Lu
A highly phosphorescent molecular Au(I) cluster capable of rapid, sensitive, and selective detection of cyanide has been successfully fabricated. The origin of the outstanding sensing performance of the molecular Au(I) cluster toward cyanide is justified by X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) analyses. The response mechanism employed with the molecular Au(I) cluster and the cost-effectiveness in cyanide detection affords several key sensor features, making this molecular Au(I) cluster-based sensor unique compared to other cyanide sensing schemes. Importantly, by exploring the phosphorescent properties of the molecular Au(I) cluster in solid state, we demonstrate the first example of the molecular gold(I) cluster-based macroporous sensing film for colorimetric detection of cyanide in complex samples, including red wine, coffee, juice, and soil. Remarkably, the as-prepared sensing film inherits the sensing ability of the molecular Au(I) cluster, and offers a high mechanical flexibility and novel opportunities for real-time monitoring cyanide release in cassava manufacturing.
研究领域:
材料科学
·
分析化学
·
环境传感
·
纳米材料
·
发光传感器
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2013
·
IF 3.365
Zhongshang Dou,Jiancan Yu,Hui Xu,Yuanjing Cui,Yu Yang,Guodong Qian
Continuous and well-attached thin films of indium trimesate metal–organic framework (MOF) were prepared rapidly by in situ solvothermal synthesis method on silicon wafer modified with platinum nanoparticles. The film growth process and possible mechanism were studied in detail. Luminescent metal–organic framework thin films, In-BTC⊃Ln , were achieved by the post-functionalization of the resulted MOF film In-BTC with lanthanide ions (Eu 3+ , Tb 3+ , Dy 3+ or Sm 3+ ). The structure and morphology of the films were investigated by XRD and SEM. The luminescent properties of the In-BTC⊃Ln films indicate that lanthanide ions are sensitized by organic linker via the metal carboxylates in the pores. More interestingly, the luminescent In-BTC⊃Ln films show good performance in fast detection of volatile thiols such as 1,2-ethanedithiol and 1-butanethiol.
研究领域:
材料科学
·
发光传感器
·
金属有机框架
·
分析化学
·
纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）