Sensing and discrimination of cyanide and hydrogen sulfide using an 8-alkenyl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene derivative

Abstract

8-(2-Phenylethenyl)BODIPY has been shown to be an appropriate chromo-fluorogenic probe for cyanide in H2O.

Coumarin–Spiropyran Dyad with a Hydrogenated Pyran Moiety for Rapid, Selective, and Sensitive Fluorometric Detection of Cyanide Anion

“…The intensity increase almost terminates within 3 min, indicating that only 3 min assay is required for CN – sensing. This assay time can be classified as one of the shortest class among the early reported CN – receptors. − In the case for CN – detection by the receptor 1 , preliminary UV irradiation (ca. 30 min) is necessary to produce the MC form (Scheme ).…”

“…A number of receptors that detect very small amounts of CN – (<1.9 μM) at reliable levels [signal-to-background (S/B) ratio ≥ 3] have been proposed. Some of these receptors, however, produce metal salts or halogens as waste. − Other receptors act only in organic media, − show insufficient selectivity, − or need a long time (>30 min) for detection. − To the best of our knowledge, there is no report of a receptor that overcomes all of these issues. The design of a new receptor that facilitates rapid, selective, and sensitive detection of CN – is therefore necessary.…”

Synthesis of BODIPY dyes through postfunctionalization of the boron dipyrromethene core

“…2-carboxylate or another copper(I) salt was needed to activate the methylthio group to make it a better leaving group.281 This copper salt also makes 8-methylthioBODIPY 34a reactive in Pdcatalyzed Liebeskind-Srogl cross-coupling reactions162 with aryl, heteroaryl and alkenylboronic acids, yielding products 389 (Scheme 103).282 Organostannanes are also reactive under similar Liebeskind-Srogl conditions. 282b,283,284 Lastly, as mentioned previously (Section 5), 8-methylthioBODIPY 34a can also be reduced to form the parent unsubstituted BODIPY 9 (Scheme 4) 72. A selection of the meso-substituted BODIPYs synthesized by Peña-Cabrera and coworkers…”

BODIPY-based fluorescent polymeric probes for selective detection of Fe3+ ions in aqueous solution

“…5. And the limit of detection (LOD) is calculated using the equation LOD = 3σ/K (σ is the standard deviation of the blank probe; K is the slope of the standard curve) [30].…”