128055-74-3Relevant articles and documents
Toward stable interfaces in conjugated polymers: Microporous poly(p-phenylene) and poly(phenyleneethynylene) based on a spirobifluorene building block
Weber, Jens,Thomas, Arne
, p. 6334 - 6335 (2008)
Conjugated polymer networks based on spirobifluorene building units exhibit defined photoluminescence as well as pronounced microporosity, that is, large, stable interfaces. Copyright
Bigger and Brighter Fluorenes: Facile π-Expansion, Brilliant Emission and Sensing of Nitroaromatics
Ramakrishna, Jagarapu,Venkatakrishnan, Parthasarathy
, p. 181 - 189 (2017)
π-Expanded butterfly-like 2D fluorenes and 3D spirobifluorenes 1–5 were synthesized via a DDQ-mediated oxidative cyclization strategy with a high regioselectivity. Through structural modification via π-expansion, it was possible to achieve near-ultraviolet absorption, bright-blue emission, very high near-unity fluorescence quantum yields in solution as well as in film states, and deep-lying HOMO energy levels with excellent thermal stabilities. Furthermore, these electron-rich compounds displayed a notable behavior towards sensing of nitroaromatic explosives, such as picric acid, up to a detection limit of 0.2 ppb.
Nonlinear-Optical Behaviors of a Chiral Metal-Organic Framework Comprised of an Unusual Multioriented Double-Helix Structure
Huang, Xiaoli,Li, Qiyang,Xiao, Xue,Jia, Shuping,Li, Yue,Duan, Zhigang,Bai, Lei,Yuan, Ze,Li, Lin,Lin, Zhihua,Zhao, Yonggang
, p. 6210 - 6213 (2018)
We present here the synthesis of one enantiomeric pair of metal-organic framework materials comprised of a unique multioriented double-helix structure from an achiral spirocenter ligand. Our study clearly shows that the chiral MOF material encompasses concurrently multiple nonlinear-optical functions in the solid state: the noncentrosymmetric structural feature brings the chiral MOF high second-harmonic-generation efficiency; the incorporation of the spirocenter ligand can efficiently produce two-photon-excited photoluminescence with a larger-action cross-sectional value.
HETEROATOMIC-BASED HOLE-TRANSPORT MATERIALS
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, (2021/04/30)
Heteroatomic hole transport materials are provided. The hole transport materials include a non-carbon core: two, four, or eight aromatic groups covalently bound to the non-carbon core; a. terminal substituted diphenylamine end unit on each aromatic group: and optionally aromatic linker groups linking the aromatic groups and the substituted diphenylamine end units. In some embodiments the non-carbon core is non-carbon central atom such as Si, Ge, B?, P+Sn or Pb. In other embodiments, the non-carbon core is a cubic silsesquioxane. Also provided are methods for making these materials. The materials are particularly useful as hole transport materials in perovskite solar cells.
{[Ru(bda)]:XLy}n cross-linked coordination polymers: Toward efficient heterogeneous catalysis for water oxidation in an organic solvent-free system
Zheng, Tao,Li, Lianwei
supporting information, p. 2526 - 2536 (2018/02/19)
Recently, the development of polymeric catalysts for water splitting has received an increasing amount of attention. In this study, we successfully developed a few novel cross-linked coordination polymers (CCPs) with the formula {[Ru(bda)]xLy}n as efficient heterogeneous catalysts for water oxidation in an organic solvent-free system, where Ru(bda) represents the catalytic center. Detailed water oxidation catalytic kinetics studies suggested that single-site water nucleophilic attack (WNA) is the general mechanism applied to these polymeric catalysts, which is different to the small-molecular reference, [Ru(bda)(pic)2] (pic = 4-picoline). The experimental evidence also indicated the importance of interfacial wettability and the existence of the Ru(bda)-macrocyclic fragments in the polymer network in determining the overall catalytic activity. More interestingly, end-capping modification via the pyridine/DMSO exchange reaction further removed the residual Ru(DMSO)x moieties on the surfaces of the polymer network, which leads to the improved performance with an impressive TOF of ~4.6 s-1 and TON of ~750 in an organic solvent-free system, which are superior to [Ru(bda)(pic)2]. The rate of catalysis is among the highest for a heterogeneous system reported to date. An electrochemical study showed the polymeric catalysts were also promising electrode materials for electrocatalytic water oxidation and an electrode based on CCP/Nafion/ITO maintained ~73% of its initial activity after 27 cycles under the optimal conditions.