A Self‐Assembled Palladium(II) Barrel for Binding of Fullerenes and Photosensitization Ability of the Fullerene‐Encapsulated Barrel

Abstract

Fullerene extracts obtained from fullerene soot lack their real application due to their poor solubility in common solvents and difficulty in purification. Encapsulation of these extracts in asuitable host is an important approach to address these issues.W ep resent an ew Pd 6 barrel (1), whichi s composed of three 1,4-dihydropyrrolo[3,2-b]pyrrole panels, clipped through six cis-Pd II acceptors.L arge open windows and cavity make it an efficient host for alarge guest. Favorable interactions between the ligand and fullerene (C 60 and C 70 ) allows the barrel to encapsulate fullerene efficiently.Thorough investigation reveals that barrel 1 has as tronger binding affinity towards C 70 over C 60 ,r esulting in the predominant extraction of C 70 from am ixture of the two.F inally,t he fullerene encapsulated barrels C 60 &1 and C 70 &1 were found to be efficient for visible-light-induced singlet oxygen generation. Such preferential binding of C 70 and photosensitizing ability of C 60 &1 and C 70 &1 are noteworthy.

Rationally designed Ru(ii)-metallacycle chemo-phototheranostic that emits beyond 1000 nm

“…Metallacycle Ru1100 was then prepared via the [2 + 2] coordination-driven self-assembly of ligand 1 with the Ru(II) complex 2 by simply stirring a 1 : 1 mixture in MeOH at room temperature for 24 h (Scheme 1). Characterization was effected by means of 1 H NMR and 19 F NMR spectroscopy, electrospray ionization time-of-ight mass spectrometry (ESI-TOF-MS), and 2D-rotating frame Överhauser effect spectroscopy (ROESY). The metal-centred interactions between ligand 1 and the Ru(II) complex 2 were analysed using 1 H NMR spectroscopy.…”

“…Coordination-driven self-assembly has emerged as useful approach to accessing macromolecules. [15][16][17][18][19] Among the products of such self-assembly are metallacycles, a number of which have been the subject of drug discovery efforts due to their well-dened shapes, sizes, and their attractive uorescence and anti-tumour properties. [20][21][22] Within this general paradigm, nanoscale-sized Ru(II) metallacycles have been the focus of particular attention.…”

Construction of a π-stacked supramolecular framework using a triphenylene-cored metallo-organic cage

“…Molecular nanocages with a well-defined inner space have shown advanced applications in the fields of molecular recognition, [1][2][3][4][5][6] catalysis, [7][8][9][10] separation, [11][12][13][14] and so on. In the past few decades, numerous three-dimensional (3D) nanocages of various sizes and shapes were created using different syn-thetic approaches, such as hydrogen bonding, 15,16 metalorganic coordination, [17][18][19][20] dynamic covalent chemistry 21,22 and so on.…”

Hexaphenyltriphenylene‐Based Multicomponent Metallacages: Host–Guest Complexation for White‐Light Emission

“…Metal‐coordination‐driven self‐assembly has proved to be a powerful tool for the construction of metal–organic cages or metallacages with multifunctional and aesthetically attractive structures [1–20] . Owing to their inner cavities that could be used for guest encapsulation, they have been widely applied in the fields of molecular recognition, stabilization of active substances, catalysis, etc [21–26] .…”