77804-76-3Relevant academic research and scientific papers
High-Nuclearity Cd(II)-Nd(III) Nanowheel with NIR Emission Sensing of Metal Cations and Nitro-Based Explosives
Ma, Yanan,Yang, Xiaoping,Niu, Mengyu,Hao, Wenxin,Shi, Dongliang,Schipper, Desmond
, p. 2821 - 2827 (2021/05/10)
One Cd-Nd nanowheel [Cd8Nd4L8(OAc)8]·4OH (1, molecular sizes: 1.2 × 2.8 × 2.8 nm) was obtained by using one designed flexible Schiff base ligand containing eight coordination sites. The Schiff base ligand exhibits a hexadentate η1:η2:η1:η1:η2:η1:μ4 coordination mode. The chromogenic Cd/L components are able to transfer energy to Nd(III), leading to the near-infrared (NIR) lanthanide emission of 1. The energy transfer efficiency (ηsens) is calculated to be 39.4%. 1 shows interesting luminescent sensing activity toward metal cations and nitro-based explosives, in particular to Cu(II), Fe(III), Co(II), and 2,4,6-trinitrophenol (TNP) with high sensitivity. The quenching constants of the complex toward Cu(II), Fe(III), Co(II), and TNP respectively are 8.6 × 104, 6.8 × 104, 6.5 × 104, and 2.1 × 105 M-1. The luminescent sensing of the nanowheel to metal cations is able to be explained by chelation enhancement of the quenching (CHEQ) effect, and its high selectivityto TNP is caused by the photoinduced electron transfer process and inner filter effect , even with the existence of other nitro-based explosives.
One High-Nuclearity Cd(II)-Yb(III) Nanoring with Near-IR Luminescent Sensing to Antibiotics
Ma, Yanan,Yang, Xiaoping,Shi, Dongliang,Niu, Mengyu,Schipper, Desmond
, p. 16809 - 16813 (2020/12/28)
One 12-metal Cd(II)-Yb(III) nanoring, [Cd8Yb4L8(OAc)8]·4OH (1), with a size of 1.2 × 2.8 × 2.8 nm was obtained from a designed flexible salen-type ligand that has eight coordination sites (O and N atoms). The near-IR emission of Yb(III) at 983 nm was detected upon the excitation of ligand-central absorption at 386 nm. This Cd(II)-Yb(III) nanoring exhibits high sensitivity to nitrofuran antibiotics (NFAs) even in the presence of other antibiotics. The quenching constants and limits of detection of NFAs are 2.5 × 104-4.5 × 104 M-1 and 1.5-2.8 μM, respectively.
SYNTHESIS OF BAPTA-AM ANALOGUES CAPABLE OF ENHANCING THE VASCULAR PRODUCTION OF PROSTACYCLIN
Heilporn, S.,Broeders, F.,Daloze, D.,Braekman, J. C.,Boeynaems, J. M.
, p. 309 - 320 (2007/10/02)
About 30 analogues of BAPTA-AM, a potential antithrombotic agent, have been synthesized and tested for their effect on the production of prostacyclin.None of them was found to be a better enhancher of the production of prostacyclin by aortic endothelial cells than BAPTA-AM itself.The enhancing effect can be produced by compounds unable to chelate Ca2+, thus confirming that it is not related to their buffering capacity for free Ca2+.
Structural Effect on Chelation Selectivity of Alkaline Earth Metal Ions with Aminopolycarboxylate-Type Chelators
Kimura, Takahide,Maruyama, Tetsushi,Okamura, Mutsuo,Sugiyama, Takashi,Ando, Takashi,Ohno, Atsuyoshi
, p. 1615 - 1621 (2007/10/02)
Two derivatives of 1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid (H4bapta), in which the distance between the chelating functions is changed, have been synthesized.The structure-interaction relationships of their complexation behavior with alka
