Cd-Based Coordination Polymer Using a Bioinspired Ligand: Studies Toward Turn-On Luminescence-Based Sensing and Schottky Diode Behavior through Device Fabrication

Abstract

A new coordination polymer of formula [Cd-(C 8 N 2 O 3 H 7 ) 2 (H 2 O) 2 ] n , 1, has been synthesized via the hydrothermal method using a bioinspired ligand, N-nicotinoylglycinate. The compound was characterized by SCXRD, PXRD, FTIR spectra, and thermogravimetric analysis (TGA). Single-crystal Xray diffraction reveals the connectivity between Cd 2+ ions and Nnicotinoylglycinate layers in nature, and the layers are arranged in an ABAB.... fashion to give a three-dimensional packing arrangement stabilized by interlayer N−H•••O and O−H•••O hydrogen bonds and π•••π interactions.An aqueous dispersion of compound 1 exhibits strong emission centered at 420 nm after excitation at 280 nm. This emission has been used for the selective sensing of pxylene over other related electron-rich C 8 aromatic isomers based on luminescence turn-on. The calculated value of the limit of detection (LOD) was 84.55 ppb, which is far lower than the safe limit of p-xylene (300 ppb in water). This compound also shows pH-dependent luminescence properties and stability in a wide range of pH (1−14). In both cases (p-xylene detection and pH dependence), time-resolved studies were used to determine the excited-state lifetime and understand the mechanism of luminescence behavior in the presence of analytes. Density functional theory (DFT)-based computational studies were also carried out to understand the selectivity of detection of p-xylene over the other isomers. Schottky diodes fabricated using this material (CP) showed ideal diode-like behavior at a low voltage regime.

Bioinspired Polymers: Bridging Nature’s Ingenuity with Synthetic Innovation

“…In sensing and actuation, a broad spectrum of bioinspired innovations has emerged. These advancements range from sensors with turn-on luminescence for selective sensing influenced by Ph [15], to materials designed for adaptive light control, self-shading, and color tuning in response to environmental shifts, suitable for smart textiles and bionic skins [16]. Noteworthy achievements include materials that exhibit exceptional humidity sensing over a wide range, with quick response and recovery [17], materials that allow for large and directional deformation, leading to reversible color changes [18], ultrafast soft actuators capable of precise deformation control for applications in micromachines and soft robotics [19], and hybrid hydrogel actuators that simulate an "extension-graspretraction" motion, pushing the boundaries of soft actuation [20].…”

“…Macromol 2024, 4 191 The quest for high-performance, responsive devices for sensing and actuation represents another challenge. Investigations include luminescence-based sensors and actuators [15][16][17] and soft actuators [18][19][20], aiming for selective detection and flexible actuation. This effort is bolstered by advancements in biomaterials for biomedical uses [21,22], concentrating on dependable substances for drug delivery [23] and tissue regeneration [24].…”

Total synthesis of lissodendoric acid A via stereospecific trapping of a strained cyclic allene

“…All that remained to complete the total synthesis was to selectively reduce the a,b-unsaturated imide and perform a global deprotection. We achieved the former using a reduction protocol reported by Das et al (53), which led to saturation of the C3 amide and the C10 a,b-unsaturated amide selectively without reduction of the ester or diene functional groups. Although the overall yield of this transformation is modest (38%), given that three functional groups are being reduced (~72% yield per reduction), we deemed the yield acceptable.…”

Isolation of a Cd-Based Coordination Polymer Containing Mixed Ligands: Time- and Temperature-Dependent Synthesis, Sulfonamide Antibiotics Detection, and Schottky Diode Fabrication

“…Through a thorough analysis of the PXRD patterns of the reaction products, all of the products were identified through the comparison of their simulated XRD patterns. Out of these three products, two products (I and II) 71,72 were reported previously. In all three phases, the ratio of metal ions and organic ligands is The results are represented as two-dimensional temperature vs time plots in Figure 4.…”