Phase behavior and molecular ordering of semiflexible poly(yne)-platinum polymers in trichloroethylene

Electronic Communication in [Co2(CO)6]2-Diyne and [Co2(CO)4(dppm)]2-Diyne Complexes

“…Similar behaviour has recently been observed for Co 2 -Organometallic polymers with unsaturated bridging units (CO) 4 (dppm)(µ-alkyne) derivatives [32] . are currently the subject of much research because of their potential as non-linear optical (NLO) materials [1] [2] , liquid Results and Discussion crystals [3] [4] , and quasi-one-dimensional conductors [5] . The properties of such materials can be tuned by varying the Complexes [Co 2 (CO) 6 ] 2 (µ-diyne) have been synthesised organic link or by adjusting the metal itself.…”

Unique Metal‐Diyne, ‐Enyne, and ‐Enediyne Complexes: Part of the Remarkably Diverse World of Metal‐Alkyne Chemistry

“…The chemistry of metal alkynyls has attracted enormous attention, in particular, with the emerging interest in their potential applications in the field of materials science (2,14,16,(180)(181)(182)(183)(184)(185)(186)(187)(188)(189)(190)(191)(192)(193)(194)(195)(196)(197). The alkynyl group, with its linear geometry, structural rigidity, extended p-electron delocalization, and ability to interact with metal centers via pp-dp overlap, has allowed its use as a building block for the generation of carbon-rich, metal-containing constructs that may possess potential applications in nonlinear optical materials, molecular wires (2,16,186,(194)(195)(196) and organometallic oligomeric (193) and polymeric materials (14,57,182).…”

“…The alkynyl group, with its linear geometry, structural rigidity, extended p-electron delocalization, and ability to interact with metal centers via pp-dp overlap, has allowed its use as a building block for the generation of carbon-rich, metal-containing constructs that may possess potential applications in nonlinear optical materials, molecular wires (2,16,186,(194)(195)(196) and organometallic oligomeric (193) and polymeric materials (14,57,182). Many of these materials may have potential in molecular electronics as luminescent materials with unique properties (e.g., optical nonlinearity, electrical conductivity, and liquid crystallinity) (181,184,185,187,(190)(191)(192)197).…”

“…Analogous to rigid-rod polyamides and polyisocyanates (271), Pt and Pd polymers form nematic liquid crystalline mesophases in simple organic solvents. (54,192,272) The main chain of these polymers orients parallel or perpendicular ( Fig. 13) to the applied magnetic field of a simple nuclear magnetic resonance (NMR) magnet (56,273).…”

Metall‐Alkinyl‐σ‐Komplexe: Synthesen und Materialien

“…Wie sich aus anderen Untersuchungen an starren Stabpolymeren wie Polyamiden und Polyisocyanaten vielleicht erwarten lässt, [64] bilden konzentrierte Lösungen der Ptund Pd-Polymere in Trichlorethylen nematische Flüssigkris-talle. [65][66][67] NMR-Experimente mit rotierender Probe des Polymers lassen darauf schließen, dass die Polymerhauptkette entweder senkrecht oder parallel zum angelegten Magnetfeld orientiert sein kann. [68,69] Polymere mit Diethinylarylbrücken waren parallel und solche, die ausschließlich Dialkinyleinheiten enthalten, senkrecht zum Feld orientiert, vermutlich wegen der negativen magnetischen Anisotropie der CCBindungen (Schema 7).…”