Carbon(C)is a key constitutive element in living organisms(plants,microbes,animals,and humans).Carbon is also a basic component of agriculture because it plays a dynamic role in crop growth,development,nutrient cyclin...Carbon(C)is a key constitutive element in living organisms(plants,microbes,animals,and humans).Carbon is also a basic component of agriculture because it plays a dynamic role in crop growth,development,nutrient cycling,soil fertility,and other agricultural features.The presence of C enhances soil physical,chemical,and biological properties.The C cycle supports all life on the Earth by transferring C between living organisms and the environment.The global climate is changing,and this change is attributable to the release of carbon dioxide and other greenhouse gases from human activities.Owing to the global climate change,agriculture is expected to be majorly affected.Agricultural production is directly linked to the climate.The five main global C pools are the oceanic,geologic,pedologic,atmospheric,and biotic pools,with specific reservoirs and inter-pool fluxes.The soil organic matter has various organic C pools(active,slow,and passive pools),containing various C-based fractions and specific liability pools.Climate,geology,land use,and management techniques are some of the variables that affect organic C and its reservoirs.The dynamics of each of these variables must be understood for a thorough knowledge of how they impact the soil C pools and storage capacity under the changing climate conditions.This review provides a comprehensive overview of the various factors that affect soil C pools/fractions and their C sequestration capacity.展开更多
Fluorescent probes emitting in the near-infrared zone Ⅱ(NIR-Ⅱ) spectral region(1000–1700 nm) have garnered significant attention due to their unique advantages in bioimaging and diagnostics, including deep tissue p...Fluorescent probes emitting in the near-infrared zone Ⅱ(NIR-Ⅱ) spectral region(1000–1700 nm) have garnered significant attention due to their unique advantages in bioimaging and diagnostics, including deep tissue penetration,superior spatial resolution, and minimal interference from autofluorescence or scattering in biological tissues.展开更多
Despite extensive investigations into photophysics at the molecular level,the complex interplays between intermolecular interactions,hierarchical assembly,and photoluminescence properties remain a fundamental challeng...Despite extensive investigations into photophysics at the molecular level,the complex interplays between intermolecular interactions,hierarchical assembly,and photoluminescence properties remain a fundamental challenge in materials science,particularly concerning emergent phenomena in molecular aggregates.Herein,we construct different dimeric structures in both solution and aggregate states through cycloreversion upon photoirradiation from a series of nonemissive phenanthrene cycloadducts,exhibiting state-dependent photoactivatable luminescence.Specifically,the excimer in solution is nonemissive due to its antiparallel cofacial structure.In contrast,the dimer in the crystal exhibits nonclassical excimer emission according to its cross-stacked stacking within the restriction of the crystal lattice.Prominently,the luminescent behavior in aggregate is uniquely accessible through photocycloreversion and cannot be achieved through spontaneous crystallization of their parent phenanthrene molecules.Moreover,the photoactivatable nature of these materials is successfully demonstrated in thin films,showcasing their potential applications in information encryption.This work expands the possibilities for constructing new functional aggregate materials by photochemistry and deepens our understanding of dimer-luminescence relationships in different states.展开更多
Sable organic radicals are promising materials for information storage,molecular magnetism,electronic devices,and biological probes.Many organic radicals have been prepared,but most are non-or weakly emissive and degr...Sable organic radicals are promising materials for information storage,molecular magnetism,electronic devices,and biological probes.Many organic radicals have been prepared,but most are non-or weakly emissive and degrade easily upon photoexcitation.It remains challenging to produce stable and efficient luminescent radicals because of the absence of general guidelines for their synthesis.Herein,we present a photoactivation approach to generate a stable luminescent radical from tris(4-chlorophenyl)phosph ine(TCPP)with red emission in the crystal state.The mechanistic study suggests that the molecular symmetry breaking in the crystal causes changes of molecular conformation,redox properties,andmolecular packing that facilitates radical generation and stabilization.This design strategy demonstrates a straightforward approach to develop stable organic luminescent radicals that will open new doors to photoinduced luminescent radical materials.展开更多
Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique st...Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique stimuli-responsive behavior in an aggregate or solid state.Metallophilic interactions are mostly found between metals with either identical(d^(10)–d^(10))or different(s^(2)–d^(8),d^(8)–d^(10))configurations.Among various metallophilic interactions,aurophilic interactions(Au⋯Au)are well-known and widely reported.In this study,a new phosphorescent gold(I)complex,[(CF_(3)Ph)_(3)PAuC≡CPh](TPPGPA)was reported.展开更多
文摘Carbon(C)is a key constitutive element in living organisms(plants,microbes,animals,and humans).Carbon is also a basic component of agriculture because it plays a dynamic role in crop growth,development,nutrient cycling,soil fertility,and other agricultural features.The presence of C enhances soil physical,chemical,and biological properties.The C cycle supports all life on the Earth by transferring C between living organisms and the environment.The global climate is changing,and this change is attributable to the release of carbon dioxide and other greenhouse gases from human activities.Owing to the global climate change,agriculture is expected to be majorly affected.Agricultural production is directly linked to the climate.The five main global C pools are the oceanic,geologic,pedologic,atmospheric,and biotic pools,with specific reservoirs and inter-pool fluxes.The soil organic matter has various organic C pools(active,slow,and passive pools),containing various C-based fractions and specific liability pools.Climate,geology,land use,and management techniques are some of the variables that affect organic C and its reservoirs.The dynamics of each of these variables must be understood for a thorough knowledge of how they impact the soil C pools and storage capacity under the changing climate conditions.This review provides a comprehensive overview of the various factors that affect soil C pools/fractions and their C sequestration capacity.
基金supported by the National Key Research and Development Program of China(2023YFB3810001)the National Natural Science Foundation of China(52333007,52273197,52250410355)+3 种基金the Shenzhen Key Laboratory of Functional Aggregate Materials(ZDSYS20211021111400001)the Science Technology Innovation Commission of Shenzhen Municipality(GJHZ20210705141810031,KQTD20210811090142053,JCYJ20220818103007014,LGKCYLWS2023017)the Innovation and Technology Commission(ITC-CNERC14SC01)the Science and Technology Program of Guangzhou,China(2023A04J0069).
文摘Fluorescent probes emitting in the near-infrared zone Ⅱ(NIR-Ⅱ) spectral region(1000–1700 nm) have garnered significant attention due to their unique advantages in bioimaging and diagnostics, including deep tissue penetration,superior spatial resolution, and minimal interference from autofluorescence or scattering in biological tissues.
基金supported by the National Natural Science Foundation of China(52303382,52333007)Shenzhen Key Laboratory of Functional Aggregate Materials(ZDSYS20211021111400001)+2 种基金the Science Technology Innovation Commission of Shenzhen Municipality(KQTD20210811090142053,JCYJ20220530143805012)Shenzhen Science and Technology Program(grant no.2024SC0019)the 2022 Joint Fund Project between the Second Affiliated Hospital and the Chinese University of Hong Kong,Shenzhen(Special project of AIE Center).
文摘Despite extensive investigations into photophysics at the molecular level,the complex interplays between intermolecular interactions,hierarchical assembly,and photoluminescence properties remain a fundamental challenge in materials science,particularly concerning emergent phenomena in molecular aggregates.Herein,we construct different dimeric structures in both solution and aggregate states through cycloreversion upon photoirradiation from a series of nonemissive phenanthrene cycloadducts,exhibiting state-dependent photoactivatable luminescence.Specifically,the excimer in solution is nonemissive due to its antiparallel cofacial structure.In contrast,the dimer in the crystal exhibits nonclassical excimer emission according to its cross-stacked stacking within the restriction of the crystal lattice.Prominently,the luminescent behavior in aggregate is uniquely accessible through photocycloreversion and cannot be achieved through spontaneous crystallization of their parent phenanthrene molecules.Moreover,the photoactivatable nature of these materials is successfully demonstrated in thin films,showcasing their potential applications in information encryption.This work expands the possibilities for constructing new functional aggregate materials by photochemistry and deepens our understanding of dimer-luminescence relationships in different states.
基金financially supported by theNationalNatural Science Foundation of China(grant no.21788102)the NaturalScienceFoundationofGuangdongProvince(grant nos.2019B121205002 and 2019B030301003)+3 种基金the Research Grants Council of Hong Kong(grant nos.16305618,16305518,C6014-20W,C6009-17G,and AoE/P-02/12)the National Key Research and Development Program(grant no.2018YFE0190200)the Innovation and Technology Commission(grant no.ITC-CNERC14SC01)the Science and Technology Plan of Shenzhen(grant nos.JCYJ20180306174910791,JCYJ20170818113530705,JCY J20170818113538482,and JCYJ20160229205601482).
文摘Sable organic radicals are promising materials for information storage,molecular magnetism,electronic devices,and biological probes.Many organic radicals have been prepared,but most are non-or weakly emissive and degrade easily upon photoexcitation.It remains challenging to produce stable and efficient luminescent radicals because of the absence of general guidelines for their synthesis.Herein,we present a photoactivation approach to generate a stable luminescent radical from tris(4-chlorophenyl)phosph ine(TCPP)with red emission in the crystal state.The mechanistic study suggests that the molecular symmetry breaking in the crystal causes changes of molecular conformation,redox properties,andmolecular packing that facilitates radical generation and stabilization.This design strategy demonstrates a straightforward approach to develop stable organic luminescent radicals that will open new doors to photoinduced luminescent radical materials.
基金supported by the National Natural Science Foundation of China(no.21788102)the Natural Science Foundation of Guangdong Province(nos.2019B121205002 and 2019B030301003)+1 种基金the Research Grants Council of Hong Kong(nos.16305618,16305518,16304819,C6009-17G,and C6014-20W)the Innovation and Technology Commission(no.ITC-CNERC14SC01).
文摘Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique stimuli-responsive behavior in an aggregate or solid state.Metallophilic interactions are mostly found between metals with either identical(d^(10)–d^(10))or different(s^(2)–d^(8),d^(8)–d^(10))configurations.Among various metallophilic interactions,aurophilic interactions(Au⋯Au)are well-known and widely reported.In this study,a new phosphorescent gold(I)complex,[(CF_(3)Ph)_(3)PAuC≡CPh](TPPGPA)was reported.
