Rapid, sensitive, and selective quantitative detection of pyridine dicarboxylic acid (DPA) as biomarker of anthrax spores is in great demand since anthrax spores are highly lethal to human beings and animals and also potential biological warfare agents. Herein, we prepared a ratiometric fluorescence lanthanide functionalized micelle nanoprobe by "one-pot" self-assembly, with an amphiphilic ligand containing β-diketone derivative which can "immobilize" terbium ions through the coordination interaction and a fluorophore as fluorescence reference (FR). The detection strategy was ascribed to Tb ions in lanthanide functionalized micelle, which can be sensitized to emit the intrinsic luminescence upon addition of DPA due to the presence of energy transfer when DPA chromophore coordinated with Tb ion. The fluorescence intensity of FR remained essentially constant, leading to ratiometric fluorescence response toward DPA. The results demonstrate that the terbium functionalized micelle was able to sensitively detect DPA with a linear relation in the range of 0 μM to 7.0 μM in aqueous solution, which also showed remarkable selectivity to DPA over other aromatic ligands. Our work paves a new way in the design of ratiometric fluorescence lanthanide functionalized micelle nanoprobes which can be promising for selective and sensitive detection of bacterial spores or biomolecules.
A molecular tweezer
trans
-di(perylene-3-ylmethanaminobenzo)-18-crown-6
(DP-18C6) incorporating two perylene subunits in a single crown ether
core was designed and synthesized as a host for fullerenes. Through
the cooperative effect of the perylene subunits and the crown ether
moiety, DP-18C6 can efficiently recognize fullerenes including C
60
, C
70
, and C
76
.
1
H NMR titration
and fluorescence titration experiments demonstrated that DP-18C6 can
effectively grasp the fullerene molecule to form a 1:1 host–guest
complex. Density functional theory calculations revealed the presence
of intermolecular π–π interactions between the
perylene subunits of DP-18C6 and the fullerene molecule. More importantly,
DP-18C6 exhibited remarkably high binding selectivity for higher fullerenes
over C
60
, revealing potential application for the separation
of fullerenes by means of host–guest interactions.
Three novel donor–acceptor–acceptor configured small molecules with benzotriazole as the central A building block are synthesized as donor materials for vacuum‐deposited small‐molecule organic solar cells (SMOSCs). The effects of different lengths of the side chains attached to the benzotriazole block on the molecular structure, electrochemical behavior, and optical properties of these donors are investigated systematically. Vacuum‐deposited SMOSCs fabricated with these small molecule donors and C70 as the acceptor exhibit power conversion efficiencies (PCEs) in the range of 6.42–7.43% under air mass 1.5 global (AM 1.5 G) 100 mW cm−2 simulated solar illumination. Furthermore, the Me‐DTDCPT‐based devices deliver a promising PCE of 14.84% under 600 lux illumination by a fluorescent lamp, demonstrating its potential in indoor photovoltaic applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.