The Role of Hydrazine in Colorimetric Probes Based on Ferrocene Derivative

Abstract

Two colorimetric and fluorescent probes based on ferrocene derivatives have been designed and synthesized. Among studied anions (F−, AcO−, H2PO4−, Cl−, Br− and I−), probe 1 with p‐nitrophenyl hydrazine structure has the strongest binding ability for F−, as well as probe 2 for H2PO4−. It had strong binding ability and was not affected by other anions. The determination limit of 1 toward F− was 5.0×10−6 mol⋅L−1 which can be used for the trace detection of F−. The interacted process of host–guest accompanied by colorimetric changes and increment in fluorescent intensity of the probes. A 1H‐NMR titration experiment and theoretical investigation indicated that −NH in hydrazine participated in the interaction, and the hydrogen‐bonding formed between the probes and anions. These results provided an essential clue to the developing the colorimetric probe based on hydrazine participation.

Optical and Thermal Investigations of Eutectic Metallomesogen Mixtures Based on Salicylaldiaminates Metal Complexes with a Large Nematic Stability Range

“…The studies on liquid-crystalline organo-transition metal complexes continue to generate enormous research interest for their ability to easily tune photochemical and photophysical properties. This has made them particularly promising for applications in organic electronics and sensors in various fields as photovoltaic devices [1][2][3][4], DNA binders [5][6][7][8][9][10][11], sensors [12][13][14][15], photosensitizers [16][17][18], molecular chemistry [19], fluorescent and colorimetric probes [20][21][22][23][24][25][26][27][28][29][30][31], medicinal chemistry [32] and metal-organic framework (MOF) construction [33][34][35] but also in more interesting topics of contemporary applied research such as electroluminescent displays, smart sensors, encryption systems or fuel cells but also in large varieties of metallomesogens with photoluminescence [36][37][38], electroluminescence [39][40][41][42], magnetic [43][...…”