The straightforward identification of enantiomers is of large importance to applications in the pharmaceutical,food and agricultural industries.We report the incorporation of two ligands containing the 1,1’-binaphthy...The straightforward identification of enantiomers is of large importance to applications in the pharmaceutical,food and agricultural industries.We report the incorporation of two ligands containing the 1,1’-binaphthyl(BINOL)core with axial chirality and D-camphoric acid containing point chirality into Zn(II)metal–organic framework(MOF)chiral fluorescence sensors.The Zn(Ⅱ)MOFs displayed outstanding enantioselectivity as chiral fluorescent sensors with an exceptional enantiomeric ratio(ER)of 3.92 which is amongst the highest values reported,along with excellent accuracy for the determination of enantiomeric excess in unknown samples.The role of complementary void shapes,a chiral co-ligand and hydrogen bonding interactions between the vip and sensors are explored.展开更多
The ever-increasing need to determine and monitor the chemical constituents of the constantly evolving environment has led the global scientific community to invest considerable research effort in the development of e...The ever-increasing need to determine and monitor the chemical constituents of the constantly evolving environment has led the global scientific community to invest considerable research effort in the development of efficient and user-friendly chemical sensors.The development of improved chemical sensors largely depends on the synthesis of novel materials with the ability to transform a molecular recognition event into a readable signal.Among the various types of sensory materials,those where analyte detection is based on the change of a luminescence signal are gaining increasing attention due to the extremely high sensitivities which can be achieved in combination with new technological advances enabling the integration of optical detection systems in small,portable and easy to use devices.In this critical review we approach the emerging field of sensory materials based on luminescent metal–organic frameworks(LMOFs)by beginning with a survey of the general principles of luminescence-based sensing.In particular,after a brief overview,we first focus on the working principles and successes of well established sensory materials based on small molecules and conjugated polymers.Subsequently,we concentrate on the special features of LMOFs which make them promising sensory materials and we discuss best practices which researchers in the field should follow in order to prove the sensing ability of LMOFs and avoid common misconceptions and errors.We continue with presenting selected examples of LMOF-based sensors for nitroaromatics,humidity and heavy metal ions from the recent literature and we conclude with a summary of the state-of-the-art of LMOF sensors.Finally,we propose some directions for future research on LMOF sensors.展开更多
In this work,in situ luminescence analysis was applied for the first time for monitoring the phase transitions of calcium phosphate(CaP)and confirmed by synchrotron in situ X-ray diffraction in addition to in situ inf...In this work,in situ luminescence analysis was applied for the first time for monitoring the phase transitions of calcium phosphate(CaP)and confirmed by synchrotron in situ X-ray diffraction in addition to in situ infrared spectroscopy,with simultaneous measurements of pH and ion conductivity.Applying doped Ce^(3+)and Eu^(3+)as local coordination sensors,the high sensitivity of their emission spectra upon the changes in the coordination sphere of the doped cation sites enabled to detect the formation of amorphous calcium phosphate(ACP)and Ca_(5)(PO_(4))_(3)OH,besides their subsequent transitions to CaHPO_(4)·2H_(2)O and Ca_(8)H_(2)(PO_(4))_(6)·5H_(2)O under real reaction conditions.Calcium phosphates are widely present in mammals and understanding their phase transitions is important to comprehend the conversion between healthy and diseased tissues.In situ luminescence measurements are advantageous for allowing monitoring these phase transitions in a fast and sensitive fashion also in conventional laboratories,independent of synchrotron radiation.展开更多
基金the Australian Research Council Centre of Excellence in Exciton Science(project number CE170100026)and funded by the Australian Government.
文摘The straightforward identification of enantiomers is of large importance to applications in the pharmaceutical,food and agricultural industries.We report the incorporation of two ligands containing the 1,1’-binaphthyl(BINOL)core with axial chirality and D-camphoric acid containing point chirality into Zn(II)metal–organic framework(MOF)chiral fluorescence sensors.The Zn(Ⅱ)MOFs displayed outstanding enantioselectivity as chiral fluorescent sensors with an exceptional enantiomeric ratio(ER)of 3.92 which is amongst the highest values reported,along with excellent accuracy for the determination of enantiomeric excess in unknown samples.The role of complementary void shapes,a chiral co-ligand and hydrogen bonding interactions between the vip and sensors are explored.
文摘The ever-increasing need to determine and monitor the chemical constituents of the constantly evolving environment has led the global scientific community to invest considerable research effort in the development of efficient and user-friendly chemical sensors.The development of improved chemical sensors largely depends on the synthesis of novel materials with the ability to transform a molecular recognition event into a readable signal.Among the various types of sensory materials,those where analyte detection is based on the change of a luminescence signal are gaining increasing attention due to the extremely high sensitivities which can be achieved in combination with new technological advances enabling the integration of optical detection systems in small,portable and easy to use devices.In this critical review we approach the emerging field of sensory materials based on luminescent metal–organic frameworks(LMOFs)by beginning with a survey of the general principles of luminescence-based sensing.In particular,after a brief overview,we first focus on the working principles and successes of well established sensory materials based on small molecules and conjugated polymers.Subsequently,we concentrate on the special features of LMOFs which make them promising sensory materials and we discuss best practices which researchers in the field should follow in order to prove the sensing ability of LMOFs and avoid common misconceptions and errors.We continue with presenting selected examples of LMOF-based sensors for nitroaromatics,humidity and heavy metal ions from the recent literature and we conclude with a summary of the state-of-the-art of LMOF sensors.Finally,we propose some directions for future research on LMOF sensors.
基金the development of the in situ analysis software as well as the DFG(Priority Program 1415,project BE 1653/29-1,project TE 1147/1-1),Daimler and Benz Foundation and MATsynCELL for the financial support.
文摘In this work,in situ luminescence analysis was applied for the first time for monitoring the phase transitions of calcium phosphate(CaP)and confirmed by synchrotron in situ X-ray diffraction in addition to in situ infrared spectroscopy,with simultaneous measurements of pH and ion conductivity.Applying doped Ce^(3+)and Eu^(3+)as local coordination sensors,the high sensitivity of their emission spectra upon the changes in the coordination sphere of the doped cation sites enabled to detect the formation of amorphous calcium phosphate(ACP)and Ca_(5)(PO_(4))_(3)OH,besides their subsequent transitions to CaHPO_(4)·2H_(2)O and Ca_(8)H_(2)(PO_(4))_(6)·5H_(2)O under real reaction conditions.Calcium phosphates are widely present in mammals and understanding their phase transitions is important to comprehend the conversion between healthy and diseased tissues.In situ luminescence measurements are advantageous for allowing monitoring these phase transitions in a fast and sensitive fashion also in conventional laboratories,independent of synchrotron radiation.
