Complexes of NN′-di-(2-aminoethyl)malondiamide, CH₂(CO·NH·CH₂·CH₂·NH₂)₂, with nickel, copper, and cobalt

Synthesis of New Phenanthroline‐Based Heteroditopic Ligands – Highly Efficient and Selective Fluorescence Sensors for Copper(II) Ions

“…Similar effects are observed with [Ru(bpy) 2 (H 2 L 1 )] 2+ and [Ru(bpy) 2 (H 2 L 2 )] 2+ , i.e. these complexes are, as expected, good on/off sensors for metal ions, specifically for Cu 2+ and Ni 2+ , which have electronic transitions at similar energies and are known to strongly bind to amide donors already at physiological pH 10,29…”

Synthesis and solid-state spectroscopic investigation of some novel diorganotin(IV) complexes of tetraazamacrocyclic ligands

“…Cross-polarization is one of the most important techniques in high-resolution solid-state NMR. In this technique, polarization from abundant spins such as 1 H or 19 F is transferred to dilute spins such as 13 C or 15 N in order to enhance S/N and reduce waiting time between successive experiments. The solid-sate 13 C NMR spectral data of the studied diorganotin(IV) complexes of macrocyclic ligands are presented in Table 1.…”

“…The cyclic amine-amide and cyclic peptides have many properties analogous to linear peptides and their metal complexes show functionalities resembling those of metalloproteins, thereby, making them of biological interest [15]. A large number of workers [16][17][18] are currently engaged in the synthesis of polyamide macrocycles and their coordination chemistry which is of particular interest in view of two potential donor atoms, i.e., amide nitrogen and amide oxygen [17,[19][20][21][22][23][24][25][26]. However, in the most of the polyamide macrocyclic complexes, amide nitrogen is involved in coordination and not oxygen.…”

Synthesis and Solution Behavior Studies of a Bifunctional Fluorenyl Dioxotetraamine and Its Copper(II) Complex

“…It is known that the fluorescence of the fluorenyl group can be quenched via an electron transfer (ET) mechanism from the Cu II ion to the photoexcited state of the fluorenyl group (Fl*) when the Cu II ion is chelated in the room B with deprotonation of the two amide nitrogen atoms, and the corresponding d–d jump of the Cu II ion is near to 520 nm . However, it can be seen in the Figure that the weakened fluorescence was caused by the d–d jump of the Cu II ion at 594 nm.…”