Water-soluble doubly N-confused hexaphyrin: a near-IR fluorescent Zn(ii) ion sensor in water

Abstract

A water-soluble doubly N-confused hexaphyrin (N(2)CH) having two octa-arginine peptide arms displays an enhanced near-infrared (NIR) emission around 1050 nm in the presence of Zn(2+) in aqueous solution.

Singly N‐Confused [26]Hexaphyrin: A Binucleating Porphyrinoid Ligand for Mixed Metals in Different Oxidation States

“…[5] For the multimetal coordination in a cavity, expanded porphyrins having larger cavities than porphyrins are promising. [9] However, all those previously reported hexaphyrin(1.1.1.1.1.1) systems tend to provide a symmetric coordinating environment with NNCC or NNNO cavities for bis-metal in-plane complexes in which both the metal ions are in the same oxidation states (+ 2 or + 3). In these systems the ligand could take a rectangular conformation with multi-donor sites inside the cavities similar to porphyrin pockets.…”

“…NNNN cavity). [9] However, all those previously reported hexaphyrin(1. [5] For the multimetal coordination in a cavity, expanded porphyrins having larger cavities than porphyrins are promising.…”

“…[5] For the multimetal coordination in a cavity, expanded porphyrins having larger cavities than porphyrins are promising. [8,9] Thus, for coordination of two different metal ions in variable oxidation states, an unsymmetrical binucleating environment would be necessary in the macrocycles. In these systems the ligand could take a rectangular conformation with multi-donor sites inside the cavities similar to porphyrin pockets.…”

Accuracy of Determination of Self-Diffusion Coefficients in Studies of Porphyrin-Based Complexes by 2D DOSY

“…[35,[43][44][45][46] Its chemical structure was proved by 1 H NMR spectroscopy, 2D DOSY and 2D COSY spectra. [42] NMR measurements were carried out on a Bruker Avance III 500 instrument using a standard 5 mm probehead and TopSpin software.…”

“…In this paper we analyze two different approaches in NMR spectroscopy for measuring self-diffusion coefficients on the example of well-known inverse nickel-porphyrin complexes (Figure 1). [35][36][37][38][39][40] The choice of the object is justified by an observation that dimers often appear in synthesis of these compounds. [41,42] Information on complex formation and on its existence in monomeric or dimeric form is thus important.…”