Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure–Property Relationships and Applications

Abstract

Conjugated poly-ynes and poly(metalla-ynes) constitute an important class of new materials with potential application in various domains of science. The key factors responsible for the diverse usage of these materials is their intriguing and tunable chemical and photophysical properties. This review highlights fascinating advances made in the field of conjugated organic poly-ynes and poly(metalla-ynes) incorporating group 4-11 metals. This includes several important aspects of conjugated poly-ynes viz. synthetic protocols, bonding, electronic structure, nature of luminescence, structure-property relationships, diverse applications, and concluding remarks. Furthermore, we delineated the future directions and challenges in this particular area of research.

Cyclometallated tridentate platinum(ii) arylacetylide complexes: old wine in new bottles

“…phosphorescence) are of great interest due to the numerous applications of these complexes in diverse fields. [1][2][3][4] One important example is the production of organic light-emitting devices (OLEDs) in which they can benefit from the incorporation of such materials to promote emission from otherwise wasted energy from the triplet states. In OLEDs, light emission arises from the radiative deactivation of electronically excited states that are formed by recombination of charge carriers (i.e.…”

“…light modulation, optical power limiting) based on nonlinear optics (NLO). [1][2][3] In addition to the improved emission properties of the [Pt(C^N^N)X]type complexes, [Pt(C^N^N)(CRCR)] have been demonstrated to display broader triplet excited-state absorption, higher triplet excited-state quantum yield and thus enhanced reverse saturable absorption (RSA) for nanosecond (ns) laser pulses as compared to their Pt(II)-N^N^N analogues. So, 6-phenyl-2,2 0 -bipyridyl ligand is potentially a better tridentate ligand for nonlinear absorption applications.…”

“…1 Among the most promising subsets of this class of materials are the luminescent square planar platinum(II) complexes that show a range of interesting optoelectronic properties and have found applications as sensor materials. 2 Of particular significance are the platinum poly-ynes, that contain alkyne linker groups, 3 and the platinum ''pincer'' complexes in which three of the co-ordination sites around the platinum(II) centre are occupied by a tridentate ligand, such as terpyridine. 4 While the platinum terpyridine complexes have been studied extensively over the last two decades, and their physical and material properties established, 5,6 related cyclometallated complexes, those with an aromatic polydentate ligand directly bound to platinum(II) centre through a covalent metal-carbon bond, have been studied in much less detail.…”

Crystallization‐Driven Asymmetric Helical Assembly of Conjugated Block Copolymers and the Aggregation Induced White‐light Emission and Circularly Polarized Luminescence

“…Assembling p-conjugated block copolymers into wellcontrolled structures is promising for development of novel semiconducting nanomaterials with potential applications in organic field-effect transistors (OFETs), light-emitting devices (OLEDs) and photovoltaics (OPVs). [1][2][3][4][5] Even great efforts have been devoted to this area for decades,c ontrol over the morphology and dimensions of supramolecular assemblies is still ag reat challenge,e specially for onedimensional (1D) semiconducting nanostructures. [6][7][8][9] Cylindrical and fiber-liker micelles are among the most attractive 1D morphologies,o wing to their versatile applications,s uch as in nanoelectronic device fabrication, drug delivery.…”

Reactivity of Polyynes: Complex Molecules from Simple Carbon Rods

“…[42] Moreover, review works related to all types of 1-D carbon wires and hypothetical properties of carbyne were also published by Tykwinski and co-workers, [43,44] Fazzi and Vozzi, [45] and Casari et al [46,47] Conversion of polyynes into materials was also summarized by Tykwinski and co-workers in 2013 [48] and in 2017. [50] Moreover, two reviews that addressed the synthesis and reactivity of cumulenes -other models of carbyne -were lately published by Tykwinski and co-workers, who made a tremendous progress in this area during the last few years. [50] Moreover, two reviews that addressed the synthesis and reactivity of cumulenes -other models of carbyne -were lately published by Tykwinski and co-workers, who made a tremendous progress in this area during the last few years.…”