Novel triazole-based fluorescent probes for Pd2+ in aqueous solutions: design, theoretical calculations and imaging

Abstract

The first triazole-containing fluorescent probe with excellent water-solubility for Pd(2+) was presented. The results indicated that an amide-triazole-amide binding sequence was responsible for the unique affinity of PS-1 toward Pd(2+). Among the tested metal ions, only Pd(2+) could selectively quench the fluorescence of PS-1 under physiological conditions, while other common interference ions like Pt(2+) and Ru(3+) caused little changes. The successful fluorescence imaging of Pd(2+) in HeLa cells implied the potential applications of PS-1 in biological Pd(2+)-analysis.

Gas‐Phase Ion Fluorescence Spectroscopy of Tailor‐made Rhodamine Homo‐ and Heterodyads: Quenching of Electronic Communication by π‐Conjugated Linkers

“…Monomer 3 was readily achieved from R575 perchlorate according to Scheme 3inquantitative yield, without need for purification. Fors ynthesis of 3,am uch better yield was obtained via the acid chloride route,while using the formerly reported method by refluxing R575 perchlorate and propargylamine in ethanol gave ay ield of 40-68 %; [16] the advantage of proceeding via the acid chloride is that this method also works for compounds not soluble in ethanol. The dimer D2 was prepared in quantitative yield by an oxidative coupling of 3 using Pd 2 dba 3 ,dppe,CuI, and I 2 .Monomer M2 could under these conditions be obtained in ay ield of 37 % (from 3 and trimethylsilylacetylene), but changing to the Pd(PPh 3 ) 2 Cl 2 and CuI catalyst system gave ah igher yield of 95 %.…”

Gas‐Phase Ion Fluorescence Spectroscopy of Tailor‐made Rhodamine Homo‐ and Heterodyads: Quenching of Electronic Communication by π‐Conjugated Linkers

“…Monomer 3 was readily achieved from R575 perchlorate according to Scheme 3 in quantitative yield, without need for purification. For synthesis of 3, a much better yield was obtained via the acid chloride route, while using the formerly reported method by refluxing R575 perchlorate and propargylamine in ethanol gave a yield of 40-68 %; [16] the advantage of proceeding via the acid chloride is that this method also works for compounds not soluble in ethanol. The dimer D2 was prepared in quantitative yield by an oxidative coupling of 3 using Pd 2 dba 3 , dppe, CuI, and I 2 .…”

Whey peptide-encapsulated silver nanoparticles as a colorimetric and spectrophotometric probe for palladium(II)

“…Palladium(II) (Pd(II)) is an important transition metal known for effective catalytic performance in a range of organic reactions, including Suzuki, Heck, Sonogashira, Buchwald-Hartwig, and Miyaura [1,2]. However, Pd(II)-catalyzed reactions are known to produce materials contaminated with Pd(II) [3]. Therefore, it is often found in the purified materials at high levels, even after a series of purification steps.…”