来源：ACS PublicationsA straightforward synthesis of Cp*2Sc(AlMe4) (Cp* = C5Me5) applying Cp*2ScCl(thf) and LiAlMe4/AlMe3 is described. Donor-assisted trimethyltriel exchange gives access to Cp*2Sc(EMe4) (E = Ga, In), which represent the first scandium tetramethylgallate and tetramethylindate complexes. Thermal treatment of Cp*2Sc(EMe4) (E = Ga, In) in benzene leads to the isolation of methylidene clusters Cp*6Sc4E8(CH2)12Me6 (E = Ga, In). This methyl group deprotonation differs from the benzene activation previously observed for Cp*2Y(EMe4) (E = Al, Ga). Treatment of Cp*2Sc(EMe4) (E = Al, Ga) wi...
Release time:
2025
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Zero-Field Single Molecular Magnet Behavior of Selenotungstate-Encapsulated Dy(III) Tetramers 来源：ACS PublicationsTwo tartaric acid-bridged organic–inorganic hybrid Dy(III)-substituted selenotungstates [HN(CH3)2]2K8Na14[(α-SeW9O33)4Dy4(H2O)4W6(tart)4O12]·33H2O (1) and K16[(α-SeW9O33)4Dy4(H2O)12W6(tart)2O12]·42H2O (2) are synthesized by controlling the reaction parameters such as counter cations and pH. Tetrameric polyoxoanions 1 and 2 consist of four trivacant Keggin [α-SeW9O33]8– fragments, which encapsulate the heterometallic clusters [Dy4(H2O)4W6(tart)4O12]12+ and [Dy4(H2O)12W...
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2025
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来源：ACS PublicationsThe AM2Pn2 (A= Ca, Sr, Ba, Yb, Mg; M = Zn, Cd, Mg; and Pn = N, P, As, Sb, Bi) family of Zintl phases has been known as thermoelectric materials and has recently gained much attention for highly promising materials for solar absorbers in single-junction and tandem solar cells. In this paper, we will, from first principles, explore the entire family of AM2Pn2 compounds in terms of their ground-state structure, thermodynamic stability, and electronic structure. We also perform photoluminescence spectroscopy on bulk powder and thin film samples to verify our results, including t...
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2025
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Defects and Defect Association Determine the Actual Entropy of Perovskites Derived from Lanthanum–Calcium Ferrite来源：ACS PublicationsPerovskites La1/2Ca1/2Mn1/3Fe1/3Co1/3O3−δ and iron-rich La3/4Ca1/4Mn1/4Fe1/2Co1/4O3−δ with five cations distributed through the A (La and Ca) and B (Mn, Fe, and Co) positions have been prepared by the combustion method. The corresponding nominal configurational entropies are 1.79R for the former and 1.61R for the latter. The actual configurational entropy may vary from these values due to metal ordering and the presence of oxygen vacancies; this is observed for th...
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2025
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