Synthesis and Photophysics of Fully 锜?Conjugated Heterobis-Functionalized Polymeric Molecular Wires via Suzuki Chain-Growth Polymerization was written by Elmalem, Einat;Biedermann, Frank;Johnson, Kerr;Friend, Richard H.;Huck, Wilhelm T. S.. And the article was included in Journal of the American Chemical Society in 2012.Electric Literature of C14H21BO4 This article mentions the following:
Fully 锜?conjugated polymers of 2-bromo-9,9-dioctylfluoren-2-yl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane with with d.p. up to 23 and near quant. (>95%) heterobis-functionalization are prepared by a controlled Suzuki chain-growth polymerization, with control over mol. weight, narrow polydispersity, and ability to define polymer end groups. The first end group is introduced through the initiator metal complex tert-Bu3PPd(X)Br (X = aryl), while the second end group is added by quenching of the chain-growth polymerization with the desired boronic esters. In all cases, polymers obtained at 50% conversion showed excellent end group fidelity and high purity following a simple workup procedure, as determined by MALDI-TOF, GPC, and 1H and 2D NMR. End group functionalization altered the optoelectronic properties of the bridge polymer. Building on a common fluorene backbone, and guided by DFT calculations, donor and acceptor end groups introduced to create polymeric mol. wires exhibiting charge transfer and energy transfer as characterized by fluorescence, absorption, and transient absorption spectroscopy as well as by fluorescence lifetime measurements. In the experiment, the researchers used many compounds, for example, 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4Electric Literature of C14H21BO4).
2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).Electric Literature of C14H21BO4
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem