Synthesis of new 1,3-bis(phenylethynyl)disilazanes

Three new 1,3-bis（phenylethynyl）disilazanes were synthesized from the reaction of 1,3-dichlorodisilazanes with （phenylethynyl）lithium, and characterized by infrared （IR） spectra, nuclear magnetic resonance （NMR） and mass spectrometry （MS）.

SYNTHESIS AND CHARACTERIZATION OF SILAZANE OLIGOMER CONTAINING 1,1,3,3,5,5-HEXAMETHYLCYCLOTRISILAZANE

A new silazane oligomer containing cyclotrisilazane was synthesized by KH-catalyzed dehydro-coupling reactions between diphenylsilane and 1,1,3,3,5,5-hexamethylcyclotrisilazane (D-3(N)).

A silazane additive for CsPbI_(2)Br perovskite solar cells

Adding additives into peroskite precursor solution has been proven as a simple and efficient strategy to improve the quality of peroskite films.In this work,we demonstrate an effective additive strategy to improve the quality of all-inorganic perovskite films by adding a novel silazane additive heptamethyldisilazane(HDMS).The power conversion efficiency(PCE)of the optimized devices is enhanced from 14.55%to 15.31%with an open-circuit voltage over 1.26 V due to the higher quality perovskite films with lower trap density after the incorporation of HDMS.More interestingly,the HDMS devices exhibit superior humidity and thermal stability compared with the control ones.This work provides a simple and efficient strategy to enhance the device performance and stability of all-inorganic perovskite solar cells,which could facilitate its commercialization.

A Facile Synthesis Route to 1,3-dichlorodisilazanes

A new 1,3-dichlorodisilazane, 1,3-dichloro-1,3-dimethyl-1,3-divinyldisilazane (DMDV), was prepared from the reaction of hexamethyldisilazane (MMN) and methylvinyldichlorosilane. And use the same method, 1,3-dichloro-1,1,3,3-tetraphenyldisilazane (DCTPS) was also obtained in a high yield.

Synthesis and kinetics of non-isothermal degradation of acetylene terminated silazane

Novel acetylene terminated silazane compounds,with three types of substituent,were synthesized by the aminolysis of dichlorosilane with 3-aminophenylacetylene（3-APA）.Thermal property of the compounds is studied by thermogravimetry analysis （TGA）.It shows that the acetylene terminated silazane has high temperature resistance.The char yield at 1000℃is 77.6,81.9 and 68.7 wt%for methyl,vinyl,and phenyl substituted silazane,respectively.The pyrolysis kinetics of the silazane is investigated by non-isothermal thermogravimetric measurement.The pyrolysis undergoes three stages,which is resolved by PEAKFTT.The kinetic parameters are calculated by the Kissinger method.The role of functionalities on the thermal resistance is discussed.The vinyl-silazane exhibits higher thermal stability because of higher cross-linking density.

New synthesis of bis(disiloxanyl)-m-carboranes

Four bis（disiloxanyl）-m-carboranes （（RSiMe2OSiMe2）2-m-C2BloHlo, R = H, vinyl, ethynyl, aUyl） were synthesized from the reaction of bis（hydroxydimethylsilyl）-m-carborane and disilazanes, and characterized by infrared spectra （IR）, nuclear magnetic resonance （NMR） and mass soectrometrv （MS）.