The author of 《Coordination-driven self-assembly of 2D-metallamacrocycles using a shape-selective PtII2-organometallic 90° acceptor: design, synthesis and sensing study》 were Shanmugaraju, Sankarasekaran; Samanta, Dipak; Gole, Bappaditya; Mukherjee, Partha Sarathi. And the article was published in Dalton Transactions in 2011. Reference of N-(Pyridin-4-yl)isonicotinamide The author mentioned the following in the article:
Synthesis of two-dimensional metallamacrocycles via coordination-driven self-assembly of a shape-selective Pt(II)2-mol. building unit incorporating carbazole-ethynyl functionality is described. An equimolar (1:1) combination of a Pt(II)2-organometallic 90° acceptor, 3,6-bis[trans-Pt(PEt3)2(NO3)(ethynyl)]carbazole (1), with rigid linear ditopic donors La (La = 4,4′-bipyridine) and Lb (Lb = trans-1,2-bis(4-pyridyl)ethylene) afforded the corresponding [4 + 4] self-assembled octanuclear mol. squares in quant. yields. Conversely, a similar treatment of 1 with amide-based unsym. flexible ditopic donor, Lc (Lc = N-(4-pyridyl)isonicotinamide), gave a [2 + 2] self-sorted mol. rhomboid as a single product. Despite the possibility of several linkage isomeric macrocycles (rhomboid, triangle and square) due to the different connectivity of Lc, the formation of a single and sym. mol. rhomboid as the only product is an interesting observation. All the self-assembled macrocycles were fully characterized by multinuclear NMR (1H and 31P) and ESI-MS anal. Further structural insights about the size and shape of the macrocycles were obtained through energy minimization using d. functional theory (DFT) calculations Decoration of the starting carbazole building unit with Pt-ethynyl functionality enriches the assemblies to be more π-electron rich and luminescent in nature. The two octanuclear mol. squares could sense the presence of electron deficient nitroaroms. in solution by fluorescence quenching of the initial intensity upon addition They exhibited the largest quenching response with high selectivity for nitroaroms. compared to several other electron deficient aromatics tested. In the experiment, the researchers used many compounds, for example, N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3Reference of N-(Pyridin-4-yl)isonicotinamide)
N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3) belongs to amides. The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds.Reference of N-(Pyridin-4-yl)isonicotinamide
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics