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2. Ring Expansion Alkyne Metathesis Polymerization

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   Beauchamp, Andrew M; Chakraborty, Jhonti; Ghiviriga, Ion; Abboud, Khalil A; Lester, Daniel W; Veige, Adam S (October 2023, Journal of the American Chemical Society)
3. Recyclable Catalysts for Alkyne Functionalization

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   Trigoura, Leslie; Xing, Yalan; Chauhan, Bhanu P. (June 2021, Molecules)

   In this review, we present an assessment of recent advances in alkyne functionalization reactions, classified according to different classes of recyclable catalysts. In this work, we have incorporated and reviewed the activity and selectivity of recyclable catalytic systems such as polysiloxane-encapsulated novel metal nanoparticle-based catalysts, silica–copper-supported nanocatalysts, graphitic carbon-supported nanocatalysts, metal organic framework (MOF) catalysts, porous organic framework (POP) catalysts, bio-material-supported catalysts, and metal/solvent free recyclable catalysts. In addition, several alkyne functionalization reactions have been elucidated to demonstrate the success and efficiency of recyclable catalysts. In addition, this review also provides the fundamental knowledge required for utilization of green catalysts, which can combine the advantageous features of both homogeneous (catalyst modulation) and heterogeneous (catalyst recycling) catalysis. 

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5. Alkyne-Functionalized Platinum Chalcogenide (S, Se) Nanoparticles

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   Liu, Qiming; Song, Xingjian; DuBois, Davida; Yu, Bingzhe; Bhuller, Amrinder; Flannery, Gabriel; Hawley, Marcus; Bridges, Frank; Chen, Shaowei (January 2024, Inorganic Chemistry)

   Metal chalcogenide nanoparticles play a vital role in a wide range of applications and are typically stabilized by organic derivatives containing thiol, amine, or carboxyl moieties, where the nonconjugated particle–ligand interfaces limit the electronic interactions between the inorganic cores and organic ligands. Herein, a wet-chemistry method is developed for the facile preparation of stable platinum chalcogenide (S, Se) nanoparticles capped with acetylene derivatives (e.g., 4-ethylphenylacetylene, EPA). The formation of Pt–C≡ conjugated bonds at the nanoparticle interfaces, which is confirmed by optical and X-ray spectroscopic measurements, leads to markedly enhanced electronic interactions between the d electrons of the nanoparticle cores and π electrons of the acetylene moiety, in stark contrast to the mercapto-capped counterparts with only nonconjugated Pt–S– interfacial bonds, as manifested in spectroscopic measurements and density functional theory calculations. This study underscores the significance of conjugated anchoring linkages in the stabilization and functionalization of metal chalcogenides, a unique strategy for diverse applications. 

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