He had gone to offer his condolences over the death of a senior AIADMK leader. In a state used to titans Karunanidhi and Jayalalithaa refusing to even attend the Assembly when the other was the CM, Stalin was captured sitting in the middle of AIADMK ex-CMs O Panneerselvam and Edappadi K Palaniswami, in August.
One of the most striking images of Stalin’s chief ministership came pretty early on. The results can provide a viable approach to design the high performance cathodically colored PDI and NDI ECMs as the potential candidate for energy-saving multi-colored smart window.MK Stalin in Chennai.
The solid state ECD made of PRSA film also divulges the similar multi-chromic EC behavior. The durability test unveils the 80% retention of the optical contrast for NTSA, while 82% retention of the same for PRSA even after 800 cycles. Both NTSA and PRSA films show multichromic EC behavior in low potential range of +0.5 to −1.5 V with high optical contrast and high coloration efficiencies when measured in solution electrolytes. Two diffusion controlled quasi-reversible redox waves are envisaged in both the compounds for stepwise reduction of neutral species to mono-anion radical and mono-anion radical to di-anion radical formation. Herein, we have successfully synthesized two water soluble sulfonate group containing arylene diimides NDI-cored NTSA and PDI-cored PRSA and comprehensively characterized by different spectroscopic techniques, morphological investigation and electrochemical characterizations, etc. However, the main problems in this type of electrochromes are film processing and dissolution of the compound during operation to restrict the durability. Organic small molecules are advantageous in electrochromism as they exhibit high coloration efficiency, fast switching with vivid colors range at low potential range.
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