A mesoporous silica nanoparticle (MSN) based fluorescent sensor for dopamine was constructed with probes inside particle pores and β-cyclodextrin (β-CD) molecules on the particle surface as the selective barricade. The synergistic action of both the hydrophilic rim and hydrophobic cavity of β-CD ensures that the sensor can distinguish dopamine from other biological competitors.
Sonogashira conditions, the dinuclear complex [Co2(CO)4(μ-dppm)μ-η2-PhC2H}] (9) was isolated instead. Reaction of 1,4-bis(trimethylsilyl)butadiyne (L4) with [Co4(CO)12] afforded the known complex [Co2(CO)6(μ2-η2-Me3SiC2-)}2] (10) and with 1a yielded the desired product [Co4(CO)8(μ-dppm)(μ4-η2-Me3SiC2C⋮CSiMe3)] (12), in addition to the known complex [Co2(CO)4(μ-dppm)(μ-η2-Me3SiC2C⋮CSiMe3)] (13). Proto-desilylation
Mono-silylated 2,1,3-benzothiadiazole-based precursors. Molecular scaffolds for obtaining fluorescent organic-inorganic hybrid materials with tailored photophysical properties
作者:Victória G. Isoppo、Fabiano S. Rodembusch、Angélica V. Moro
DOI:10.1016/j.dyepig.2022.110978
日期:2023.2
benzothiadiazole and their application in obtainingorganic-inorganic fluorescent hybrid materials. The mono-silylated compounds were obtained through a Pd-catalyzed Sonogashira coupling reaction with silicon-functionalized alkynes (25–61% yield). One of the silylated products was chosen as a model compound and six additional BTD-containing products were obtained using Suzuki-Miyaura (53–91% yield) and
Routes to Ruthenium−Cobalt Clusters and Dicobalt Complexes with New Alkoxysilyl- or Sulfur-Functionalized Alkynes. X-ray Structures of [NEt<sub>4</sub>][RuCo<sub>3</sub>(CO)<sub>10</sub>{μ<sub>4</sub>-η<sup>2</sup>-HC<sub>2</sub>(CH<sub>2</sub>)<sub>2</sub>OC(O)NH(CH<sub>2</sub>)<sub>3</sub>Si(OEt)<sub>3</sub>}] and [Co<sub>2</sub>(CO)<sub>6</sub>{μ<sub>2</sub>-η<sup>2</sup>-HC<sub>2</sub>CH<sub>2</sub>NHC(O)NH(CH<sub>2</sub>)<sub>3</sub>Si(OEt)<sub>3</sub>}]
Two general approaches are presented and compared to covalently link metal clusters to alkynes terminated with a trialkoxysilyl or a thioether group. They consist in the direct reaction of the functional alkyne with the cluster or in the functionalization of an alkyne already coordinated to the cluster. These are applied to the tetrahedral mixed-metal cluster [NEt4] [RuCo3(CO)(12)] (NEt(4)(.)1). Complexes with the new alkynes HCdropC(CH2)(2)-OC(O)NH(CH2)(3)Si(OEt)(3) (L-1), HCdropCCH(2)NHC(O)NH(CH2)(3)Si(OEt)(3) (L-2), and HCdropCCH(2)-NHC(O)NHC6H4SMe (L-3) have been characterized, and the crystal structures of [NEt4]-[RuCo3(CO)(10)mu(4)-eta(2) -HC2(CH2)(2)OC(O)NH(CH2)(3)Si(OEt)(3)}] (NEt(4)(.)2a) and [Co-2(CO)(6)mu(2)-eta(2)- HC2CH2NHC(O)NH(CH2)(3)Si(OEt)(3)}] (9) have been determined by X-ray diffraction.