【摘 要】
：
Main observation and conclusionrnThree zwitterionic and one cationic N-heterocyclic allenylidene (NHA) platinum(Ⅱ) complexes were prepared and characterized via NMR,HR-MS,and FT-IR,etc.Single crystal structure analyses revealed the various intermolecular
【机 构】
：
Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong 518055,Chin
论文部分内容阅读
Main observation and conclusionrnThree zwitterionic and one cationic N-heterocyclic allenylidene (NHA) platinum(Ⅱ) complexes were prepared and characterized via NMR,HR-MS,and FT-IR,etc.Single crystal structure analyses revealed the various intermolecular packing modes via multiple noncovalent interactions (short Pt…Pt contacts,π-π interactions).The spectroscopic data demonstrated stability of the allenylidene metal complexes is largely ascribed to the resonance structures of zwitterionic acetylide.The zwitterionic and analogue cationic NHA Pt(Ⅱ) monomers showed similar steady-state photoluminescent properties in dilute fluid solution.Highly efficient solid-state phosphorescent emissions (quantum yield up to 20％) of these NHA Pt(Ⅱ) complexes are correlated with their dispersive metallophilic Pt…Pt interactions.HR-MS spectrum indicated zwitterionic monomers can self-assemble into oligomers,such as dimer,trimer and even hexamer in a mixed H2O/MeOH solvent.Meanwhile,molecular aggregates showed variable red-shifted phosphorescence by manipulating the concentration,temperature,time and solvent in the self-assembly of zwitterionic NHA platinum(Ⅱ) complex.
其他文献
The Qinghai-Tibet Plateau (QTP) is the most unique region of human-land relations,and its main factor is population.By building a population and space dataset of the QTP at the township level from 1982 to 2017,this paper presents the pattern evolvement an
Catalytic asymmetric transformations involving carbon-carbon bond cleavages open intriguing strategies for the synthesis of chiral complex molecules.The transient organometallic species mainly generate from the oxidative addition of cyclic compounds with
Annual Land Use/Land Cover(LULC)change information at medium spatial resolution(i.e.,at 30 m)is used in applications ranging from land management to achieving sustainable development goals related to food security.However,obtaining annual LULC information
Main observation and conclusionrnIt is highly urgent to develop synthetic strategies to make new category of stable luminescent radicals with desired emission wavelength.In this study,we have isolated two dioxoborocyclic radicals (3 and 4) by a direct syn
Since the introduction of the concept of frustrated Lewis pair by Stephan in 2006,the frustrated Lewis pair (FLP) chemistry has evolved into a rich and fruitful research area which is largely responsible for the renaissance of main group chemistry in rece
Baseflow,a component of the total streamflow,plays a key role in maintaining aquatic habitats,particularly during extreme drought events.This study investigated baseflow response to a prolonged and extreme meteorological drought event in the Baiyangdian B
Main observation and conclusionrnWe report herein a Re-based tricarbonyl catalyst [fac-Re(L1)(CO)3Cl] (Re1) bearing a spiro center and a phenol group as a local proton source in the second coordination sphere.Due to the large steric spiro group,dimerizati
Biochar amendment is considered as an efficient practice for improving carbon storage in soils.However,to what extent that biochar application promotes organic carbon in saline-sodic soils remains poorly understood.By comparing soil organic carbon (SOC)co
Main observation and conclusionrnEthanol is considered a better fuel than methanol in direct alcohol fuel cells because of the high energy density and low toxicity.Compared with noble metal catalysts,nickel-based catalysts are much cheaper in price.Howeve
In recent years,O2O e-commerce,represented by online group-buying,has developed vigorously,which had significant im-pacts on urban commercial space.Zhengzhou City is a rising national central city in China,and its e-commerce development level is ahead,but