- Perovskite solar cell additive based on cyanopyridine ionic liquid and applications thereof
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The invention relates to a perovskite solar cell additive based on a cyanopyridine ionic liquid and applications thereof. The chemical structural formula of the additive is represented in the description, in the formula, n represents an integer from 0 to 9; and Z represents Br, I, Cl, BF4, PF6, or TFSI. A special chemical structure is designed so that a cyano group is connected to a pyridine ring;due to the strong polarity of the cyano group, the morphology of a perovskite film can be controlled during the growth process, the prepared grains have a greater size; at the same time, due to the synergistic effect between the cyano group and pyridine cations, the internal defects in the perovskite film are reduced; and the prepared perovskite film has a very good fluorescent property.
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Paragraph 0049-0052
(2020/03/09)
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- Ring Opening and Transamination of Pyridinium Salts
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N-Alkyl-3-cyanopyridinium iodides (Ia-c) undergo ring opening and recyclization when heated with aq. alkyl amine to give 2-alkylamino-3-formylpyridines (IIa-c) and 3-cyanopyridine (III).However, when compounds Ia-c are treated with alkyl amines in which t
- Fadda, A. A.,Abdelrazek, F. M.,El-Habbal, M. M.
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p. 194 - 195
(2007/10/02)
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- Pyridine Nitrogen Reactivity
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Pyridinium pKa values and rates of quaternization with ethyl iodide in various solvents are used to evaluate the effect of substituents on the pyridine nitrogen reactivity.Substituent effects on nitrogen reactivity are found to be intrinsic properties of the pyridine system independent of specific reaction type or solvent.The relevance of hydrogen-bonding in methanol and its influence on pyridine quaternization is discussed.The influence of potential resonance acceptors is shown to be due to their inductive effect alone, and the general question of the applicability of the dual substituent parameter equation to substituent effects on nitrogen reactivity in pyridine is considered.
- Johnson, David,Roberts, Ian,Taylor, Peter G.
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p. 409 - 413
(2007/10/02)
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