Dual-heteroatom-templated lanthanoid-inserted heteropolyoxotungstates simultaneously comprising Dawson and Keggin subunits and their composite film applied for electrochemical immunosensing of auximone

Abstract

Two PIII–SbIII-heteroatom templated lanthanoid(Ln)-inserted polyoxotungstates [H2N(CH3)2]10NaH9[Ln4(H2O)14W7O15 (H2MA)4][SbIIIW9O33]2[HPIIISbIIIW15O54]2·44H2O [Ln = Nd3+ (1), Pr3+ (2)] embellished by DL-malic acid (H3MA) ligand were firstly achieved. The [Ln4(H2O)14W7O15(H2MA)4][SbIIIW9O33]2[HPIIISbIIIW15O54]220− polyanion is assembled from two trivacant...

Organophosphonic Acid-Regulating Assembly of PV–SbIII Polyoxotungstate and Its Potential in Building a Dual-Signal Readout Electrochemical Aptasensor for Carcinogen Detection

“…Simultaneously, it is worth highlighting that the Sb–O, P–O, W–O t , W–O b , and W–O c peaks in the IR spectrum of 1 @EGO are red-shifted by 5–14 cm –1 compared with 1 , while the N–H bending vibration peak in the IR spectrum of 1 @EGO red-shifts by 15 cm –1 in contrast to EGO, strongly indicating electrostatic interactions among 1a polyanions and EGO (Figure S9a). , Moreover, the ζ potential tests reveal the surface potentials of GO and EGO in aqueous solution are −29.1 and −16.2 mV, respectively (Figure S9b,c), showing that EN groups in EGO are successfully protonated (−NH 3 + and −NH 2 + ), which makes the surface potential of EGO decrease by 12.9 mV in comparison with GO. The composite of 1a polyanions with EGO increases the surface potential of 1 @EGO to −45.7 mV (Figure S9d).…”

“… Subsequently, our group reported double HA (P III –Se IV and P III –Sb III )-templated POTs (Figure S1m). , However, inorganic-and-organic template co-directing DHATPOTs have not been presented so far, leaving us a totally new frontier to be explored.…”

Organophosphonic acid and cerium functionalized antimonotungstate with electrochemical promise in biosensing bacterial dissimilatory sulfite reductase gene sequence

“…In addition, although organic ligands can be another useful tool to join POM SBUs to build organic-inorganic hybrid POM nanoclusters or even POM-based open frameworks, [13][14][15]30 organically functionalized ATs have not been widely studied. [31][32][33] Recently, organic ligand and Ln functionalized ATs (OLLFATs) have provoked remarkable interest due to their unique structural aesthetics and novel functional features. To date, some OLLFATs have been obtained by utilizing diverse flexible or rigid ligands (Fig.…”

“…S1f-o and Table S1, ESI †). 19,[33][34][35][36][37][38][39][40] However, the types of organic ligands used in the aforementioned OLLFATs are relatively limited and are mainly organic ligands with carboxyl, amidogen or hydroxyl groups. As a result, it is considerably essential to constantly search for new kinds of organic ligands to construct ground-breaking OLLFATs and further promote the development of OFCMs.…”

Two Types of Subgroup-Valence Heteroatoms (PIII, TeIV) Synergistically Controlling Octa-CeIII-Encapsulated Heteropolyoxotungstate and Its Electrochemical Recognition Properties

“…Besides, because of the too small steric hindrance of the hydrogen atom on it, the tetrahedral coordination behavior of the [HPO 3 ] 2– anion is usually like the triangular pyramidal coordination configuration of the [TeO 3 ] 2– anion. This stereochemical feature of the [HPO 3 ] 2– ion tends to integrate with tungsten centers and creates novel open-framework phospho­(III)­tungstate fragments. − (2) Although the triangular pyramidal [TeO 3 ] 2– and tetrahedral [HPO 3 ] 2– groups in the coexisting reaction system might be competitive, the stereochemical active difference of [TeO 3 ] 2– and [HPO 3 ] 2– groups will be very likely to produce negatively charged and defect P III -templating and Te IV -templating mixed HPOT BBs, which can strongly capture positively charged RE cations for constructing uncommon PTHSTREHs and will greatly enrich the structural types of POMs. (3) The addition of cerium acetate provides not only Ce 3+ ions but also acetate as the ligand.…”