Khan, Muhammad S. published the artcileSynthesis, characterization and optical spectroscopy of platinum(II) di-ynes and poly-ynes incorporating condensed aromatic spacers in the backbone, Synthetic Route of 18512-55-5, the publication is Dalton Transactions (2004), 2377-2385, database is CAplus and MEDLINE.
Protected and terminal dialkynes with extended π-conjugation through a condensed aromatic linker unit in the backbone, 1,4-bis(trimethylsilylethynyl)naphthalene, 2a, 1,4-bis(ethynyl)naphthalene, 2b, 9,10-bis(trimethylsilylethynyl)anthracene 3a, 9,10-bis(ethynyl)anthracene 3b, were synthesized and characterized spectroscopically. The solid-state structures of 2a and 3a were confirmed by single crystal x-ray diffraction studies. Reaction of two equivalent of trans-[Ph(Et3P)2PtCl] with an equivalent of the terminal dialkynes 1,4-bis(ethynyl)benzene 1b and 2b–3b, in iPr2NH-CH2Cl2, in the presence of CuI, at room temperature, afforded the Pt(II) di-ynes trans-[Ph(Et3P)2Pt-CC-R-CC-Pt(PEt3)2Ph] (R = benzene-1,4-diyl 1c; naphthalene-1,4-diyl 2c and anthracene-9,10-diyl 3c) while reactions between equimolar quantities of trans-[(Bu3P)2PtCl2] and 2b–3b under similar conditions readily afforded the Pt(II) poly-ynes trans-[-(Bu3P)2Pt-CC-R-CC-]n (R = naphthalene-1,4-diyl 2d and anthracene-9,10-diyl 3d). The Pt(II) diynes and poly-ynes were characterized by anal. and spectroscopic methods, and the single crystal x-ray structures of 1c and 2c were determined These structures confirm the trans-square planar geometry at the Pt centers and the linear nature of the mols. The di-ynes and poly-ynes are soluble in organic solvents and readily cast into thin films. Optical spectroscopic measurements reveal that the electron-rich naphthalene and anthracene spacers create strong donor-acceptor interactions between the Pt(II) centers and conjugated ligands along the rigid backbone of the organometallic polymers. TG shows that the di-ynes possess a somewhat higher thermal stability than the corresponding poly-ynes. Both the Pt(II) di-ynes and the poly-ynes exhibit increasing thermal stability along spacers from phenylene through naphthalene to anthracene.
Dalton Transactions published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Synthetic Route of 18512-55-5.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem