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The discovery of high-Tsuperconductivity in electron-doped cuprate compounds is certainly a test for the theories proposed for the hole-doped systems. In this work it is shown that a charge-transfer mechanism similar to the one proposed for hole-doped CuOand BiOsystems allows pairing of the elec...
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Depending on the applied method, the status of the Zn(II) bound to ZF can be monitored by characteristic changes in the absorbance of charge-transfer or d-d bands (transition metals, chromophoric probes), fluorescence intensity (fluorogenic probes) and CD signal (complexones). Show abstract ...
With isoelectronic sequences involving different metals, e.g. V(CO) − 6 and Cr(CO) 6, or Mo(CO) 6 and Re(CO + 6, the effect of a unit negative charge is ca. −140 cm −1, and of a unit positive charge is ca. +90 cm −1, relative to the values for the uncharged...
For example, hydrogen can carry a charge of -1 or +1. Also, the octet rule, which states that atoms tend to gain or lose electrons to achieve a stable configuration of eight valence electrons, doesn't always apply to ionic charges. In some cases, the charge can even exceed +8 or -...
The efficiency and considerable longevity of N-acylpyridinium ion has been attributed to the exceptional electron-donating ability of transition metal framework; what's more, the cyclopentadienyl moiety attached to pyridyl ring is sufficiently small to prevent unfavourable interaction with the N-acetyl ...
The pattern of the change in the charge capacity of the oxidized polypyrrole (PPy) film suggests -like in case of polythiophenes- the occurrence of the electric field induced phase transition. Thus, a common redox mechanism for the different polymers -distinguishing solvated and non-solvated ...
3.5 Detection of heavy metals and volatile organic compounds Environmental sensing and remediation is a major concern throughout the world due to number of contaminations in water and in the environment which may include but not limited to heavy metal (HM) ions. Since such heavy metal ions easil...
In this case, no charge self-doping is expected for this sample. The composition of (Li0.84Fe0.16)OHFe0.98Se is obtained by structure refinement of the single-crystal X-ray diffraction data39. By simple electron counting, the electron doping level would be 0.12 electrons per Fe. This is ...