Excited-State Identification of a Nickel-Bipyridine Photocatalyst by Time-Resolved X-ray Absorption Spectroscopy.

Photoassisted catalysis using Ni complexes is an emerging field for cross-coupling reactions in organic synthesis. However, the mechanism by which light enables and enhances the reactivity of these complexes often remains elusive. Although optical techniques have been widely used to study the ground and excited states of photocatalysts, they lack the specificity to interrogate the electronic and structural changes at specific atoms.

An Indole-Based Fluorescent Chemosensor for Detecting Zn in Aqueous Media and Zebrafish.

An indole-based fluorescent chemosensor was synthesized to detect Zn. displayed a marked fluorescence increment with Zn. The detection limit (0.

A Thiourea-Containing Fluorescent Chemosensor for Detecting Ga.

A thiourea-based fluorescent chemosensor NADA, (E)-2-(4-(diethylamino)-2-hydroxybenzylidene)-N-(naphthalen-1-yl)hydrazine-1-carbothioamide, has been designed and synthesized. NADA could detect Ga through a fluorescent turn-on with a low detection limit (0.29 μM).

Determination of Zinc Ion by a Quinoline-Based Fluorescence Chemosensor.

A novel fluorescence chemosensor XYQ for detecting Zn(II) was synthesized. XYQ showed fluorescence turn-on to Zn(II) with high sensitivity and selectivity in aqueous media among 19 metal ions. Its binding structure was demonstrated by ESI-MS, Job plot, and H NMR titration.

A Novel Thiophene-Based Fluorescent Chemosensor for the Detection of Zn and CN: Imaging Applications in Live Cells and Zebrafish.

A novel fluorescent turn-on chemosensor ((E)-3-((4-(diethylamino)-2-hydroxybenzylidene)amino)-2,3-dihydrothiophene-2-carboxamide) has been developed and used to detect Zn and CN. Compound displayed a notable fluorescence increase with Zn. The limit of detection (2.

Highly Sensitive Dansyl-Based Chemosensor for Detection of Cu in Aqueous Solution and Zebrafish.

A new dansyl-based chemosensor (2-(4-((5-(dimethylamino)naphthalen-1-yl)sulfonyl)piperazin-1-yl)--(quinolin-8-yl)acetamide) ( for detecting Cu was synthesized and characterized. showed great selectivity to Cu by a fluorescent "on-off" detection method. Job plot, ESI-mass spectroscopy, and H NMR titration suggested a 1 to 1 binding mode between and Cu.

Fluorescent determination of zinc by a quinoline-based chemosensor in aqueous media and zebrafish.

A quinoline-based fluorescence sensor QDTD was developed for Zn. QDTD can detect Zn by fluorescence turn-on. Detecting limit (0.

A visible chemosensor based on carbohydrazide for Fe(ii), Co(ii) and Cu(ii) in aqueous solution.

A colorimetric sensor with pyridyl and carbohydrazide components has been synthesized and visibly turns blue in the presence of Fe(ii). The colorless sensor also changes color when exposed to Co(ii) and Cu(ii), but its color becomes yellow. The sensor shows no visible response to other metal ions such Ca2+, Cr3+, Mn2+, Fe3+, Ni2+, Zn2+, Cd2+, Ag+, Hg2+, and Pb2+.

A multiple target chemosensor for the sequential fluorescence detection of Zn and S and the colorimetric detection of Fe in aqueous media and living cells.

A novel multiple target sensor, (E)-5-((4-(diethylamino)-2-hydroxybenzyldene)amino)-1H-imidazole-4-carboxamide (DHIC), was synthesized for fluorescence detection of Zn and S and colorimetric detection of Fe in aqueous media. DHIC can operate as a turn "on-off" sequential fluorescent sensor for Zn and S. Detection limits (1.

A Highly Selective Fluorescent Chemosensor for Detecting Indium(III) with a Low Detection Limit and its Application.

A highly selective chemosensor BHC ((E)-N-benzhydryl-2-((2-hydroxynaphthalen-1-yl)methylene)hydrazine-1-carbothioamide) for detecting indium(III) was synthesized. Sensor BHC can detect In(III) by a fluorescence turn-on method. The detection limit was analyzed to be 0.

A multi-functional chemosensor for highly selective ratiometric fluorescent detection of silver(I) ion and dual turn-on fluorescent and colorimetric detection of sulfide.

A multi-functional chemosensor as silver and sulfide detector was synthesized by the combination of octopamine and 4-dimethylaminocinnamaldehyde. Sensor exhibited a ratiometric fluorescence emission for Ag from blue to sky. The binding mode of and Ag turned out to be a 1 : 1 ratio as determined using Job plot and electrospray ionization (ESI) mass spectral analyses.

Sequential detection of Fe and pyrophosphate by a colorimetric chemosensor in a near-perfect aqueous solution.

A novel colorimetric chemosensor 1 was designed and synthesized for Fe and pyrophosphate. Sensor 1 showed a selective color change toward both Fe and Fe from yellow to brown in a near-perfect aqueous solution. The detection limits (0.