A 1,8 naphthalimide anchor rhodamine B based FRET probe for ratiometric detection of Cr3+ion in living cells
摘要:
A 2-(1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)acetaldehydeanchored rhodamine B based probe, RDNAP detects Cr3+ ion by fluorescence resonance energy transfer (FRET) process in aqueous buffered acetonitrile media (7:3, v/v). Conversely, conjugation of 2-(1,3-dioxo-6-(piperidin-1-yl)-1H-benzo[de]isoquinolin-2(3H)-yl) acetaldehyde with rhodamine B provides another probe, RDNAP-PY that undergoes Cr3+ assisted ratiometric fluorescence and colorimetric change in the same media. RDNAP-PY provides higher FRET efficiency and detects as low as 1.81 x 10(-6) M Cr3+ with an association constant, 15.9 x 104 M-1. Other common ions do not interfere. RDNAP-PY efficiently images intracellular Cr3+ in live Hep3B, MCF-7, HeLa, SiHa and HEK 293T cells under fluorescence microscope in a ratiometric and time dependent manner. H-1 NMR titration and DFT studies strongly support experimental findings.
Directional control of π-stacked building blocks for crystal engineering: the 1,8-naphthalimide synthon
作者:Daniel L. Reger、J. Derek Elgin、Radu F. Semeniuc、Perry J. Pellechia、Mark D. Smith
DOI:10.1039/b504998a
日期:——
Incorporating the 1,8-naphthalimide group into bis(pyrazolyl)methane ligands triggers the association of their rhenium(I) complexes into directionally ordered dimers in both solution and solid state, as demonstrated by ES+/MS, PGSEâNMR and X-ray diffraction studies.
正如 ES+/MS、PGSEâNMR 和 X 射线衍射研究证明的那样,在双(吡唑基)甲烷配体中加入 1,8-萘二甲酰亚胺基团,可促使其铼(I)配合物在溶液和固体状态下形成定向有序的二聚体。
First row transition metal complexes of a hexadentate pyrazole-based bispidine ligand
作者:Peter Comba、Michael Morgen、Hubert Wadepohl
DOI:10.1016/j.poly.2012.06.035
日期:2013.3
The efficient synthesis of a new hexadentate pyrazole-based bispidine-ligand and its first-row transition metal complexes (Fe-II, Co-II, Ni-II, Cu-II and zn(II)) is reported. There are interesting structural differences between the present and earlier hexadentate bispidine ligands (tetragonally versus trigonally distorted octahedral geometries). The structural analysis of the metal-free ligand and the five complexes shows that the structure enforced by the rigid pyrazole-based bispidine is best described as distorted trigonal prismatic, and this also emerges from the spectroscopic analysis. (C) 2012 Elsevier Ltd. All rights reserved.
Saito; Takayama; Sakurai, Journal of the American Chemical Society, 1994, vol. 116, # 6, p. 2653 - 2654