A neoteric inorganic-organic hybrid dual-heteroatom(HA)and lanthanide(Ln)cluster-bridged polyoxotungstate(POT)[H8BTHMMAP]_(1.5)[H_(2)N(CH_(3))_(2)]_(4)Na_(3)H[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)][(W_(...A neoteric inorganic-organic hybrid dual-heteroatom(HA)and lanthanide(Ln)cluster-bridged polyoxotungstate(POT)[H8BTHMMAP]_(1.5)[H_(2)N(CH_(3))_(2)]_(4)Na_(3)H[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)][(W_(5)O_(18))(B-α-BiW_(9)O_(33))_(2)]·44H_(2)O(1,H_(6)BTHMMAP=1,3-bis[tris-(hydroxymethyl)methylamino]propane,Hpdca=2-pyridinic acid)was prepared by the dual-HA template strategy.The skeleton of 1 possesses a threebladed propeller-shaped[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)]^(13+)core wrapped by two Keggin[B-α-BiW_(9)O_(33)]^(9−)and one Lindqvist[W_(5)O_(18)]^(6−)segments.Noteworthily,the intricate[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)]^(13+)unit consisting of a Bi-Te dual-HA-bridged Ln-W polynuclear cluster is rather attractive and rarely seen in POT crystal engineering.Prominently,1 exhibits an“ON-OFF”luminescence response triggered by Fe^(3+)based on dynamic quenching and competitive absorption,and the subsequent addition of pyrophosphate(PPi)leads to the recovery of luminescence due to the efficient interaction of Fe^(3+)and PPi.The developed“ON-OFF-ON”switch allows the consecutive discrimination of Fe^(3+)and PPi with low detection limits of 1.23μM and 2.16μM,respectively.This work provides a profound understanding of the dual-HA template approach in assembling complicated POTs,and shows the great potential of POT materials in environmental and biological detection.展开更多
基金supported by the National Natural Science Foundations of China(22371066,22101072,22071042,and 22171070)Henan Science and Technology Research Project(242102231046)+1 种基金China Postdoctoral Science Foundation(2021M701067)the Program for Kaifeng Innovation Teams of Science and Technology,and the Key Project of the Youth Interdisciplinary Foundation of Henan University.
文摘A neoteric inorganic-organic hybrid dual-heteroatom(HA)and lanthanide(Ln)cluster-bridged polyoxotungstate(POT)[H8BTHMMAP]_(1.5)[H_(2)N(CH_(3))_(2)]_(4)Na_(3)H[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)][(W_(5)O_(18))(B-α-BiW_(9)O_(33))_(2)]·44H_(2)O(1,H_(6)BTHMMAP=1,3-bis[tris-(hydroxymethyl)methylamino]propane,Hpdca=2-pyridinic acid)was prepared by the dual-HA template strategy.The skeleton of 1 possesses a threebladed propeller-shaped[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)]^(13+)core wrapped by two Keggin[B-α-BiW_(9)O_(33)]^(9−)and one Lindqvist[W_(5)O_(18)]^(6−)segments.Noteworthily,the intricate[Eu_(2)Bi_(3)(Hpdca)_(3)(H_(2)O)_(3)Te_(2)W_(3)O_(14)]^(13+)unit consisting of a Bi-Te dual-HA-bridged Ln-W polynuclear cluster is rather attractive and rarely seen in POT crystal engineering.Prominently,1 exhibits an“ON-OFF”luminescence response triggered by Fe^(3+)based on dynamic quenching and competitive absorption,and the subsequent addition of pyrophosphate(PPi)leads to the recovery of luminescence due to the efficient interaction of Fe^(3+)and PPi.The developed“ON-OFF-ON”switch allows the consecutive discrimination of Fe^(3+)and PPi with low detection limits of 1.23μM and 2.16μM,respectively.This work provides a profound understanding of the dual-HA template approach in assembling complicated POTs,and shows the great potential of POT materials in environmental and biological detection.
