本文主要研究内容
作者（2019）在《In situ generated pyroglutamate bridged polyoxotitaniums with strong circular dichroism signal》一文中研究指出：In this text, we use inexpensive and natural amino acid, successfully obtained the asymmetric crystallization of three PTCs, [Tis（OiPr）14（μ2-O）（μ3-O）2（D/L-pGlu）2]（D-PTC-53; L-PTC-53; H2 pGlu=pyroglutamic acid） and [Ti6（OiPr）14（μ2-O）（μ3-O）2（D-pGlu）2][Ti6（OiPr）14(（μ2-O）（μ3-O）2（L-pGlu）2]（D,L-PTC-53）. Interestingly, in situ lactamide reaction starting from glutamic acid to pyroglutamic acid was observed. In addition,the chirality features of these PTCs have been thoroughly discussed.The two enantiomers crys tallize in chiral P21 space group.The optically pure pGlu ligands transform its chirality to the inorganic titanium oxo clusters. As a result, the stack of these inorganic clusters generates homochiral helical chains along the characteristic axial direction.Apart from the microscopic structural analysis, the macroscopic solid-state samples exhibit unusual strong circular dichroism（CD） signals,further verified the homochiral feature of the enantiomers.
Abstract
In this text, we use inexpensive and natural amino acid, successfully obtained the asymmetric crystallization of three PTCs, [Tis（OiPr）14（μ2-O）（μ3-O）2（D/L-pGlu）2]（D-PTC-53; L-PTC-53; H2 pGlu=pyroglutamic acid） and [Ti6（OiPr）14（μ2-O）（μ3-O）2（D-pGlu）2][Ti6（OiPr）14(（μ2-O）（μ3-O）2（L-pGlu）2]（D,L-PTC-53）. Interestingly, in situ lactamide reaction starting from glutamic acid to pyroglutamic acid was observed. In addition,the chirality features of these PTCs have been thoroughly discussed.The two enantiomers crys tallize in chiral P21 space group.The optically pure pGlu ligands transform its chirality to the inorganic titanium oxo clusters. As a result, the stack of these inorganic clusters generates homochiral helical chains along the characteristic axial direction.Apart from the microscopic structural analysis, the macroscopic solid-state samples exhibit unusual strong circular dichroism（CD） signals,further verified the homochiral feature of the enantiomers.
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