Allosteric regulation of organometallic catalysts could allow for greater control over reactions. We report an allosteric supramolecular structure in which a monometallic catalytic site has been buried the middle layer triple-layer complex. Small molecules and elemental anions can open close this complex reversibly expose conceal center. The ring-opening polymerization ε-caprolactone be turned on by situ opening then completely off reforming it through abstraction Cl(-), effector agent,...

Analysis of rates tunneling across self-assembled monolayers (SAMs) n-alkanethiolates SCn (with n = number carbon atoms) incorporated in junctions having structure Ag(TS)-SAM//Ga2O3/EGaIn leads to a value for the injection tunnel current density J0 (i.e., flowing through an ideal junction with 0) 10(3.6±0.3) A·cm(-2) (V +0.5 V). This estimation does not involve extrapolation length, because it was possible measure densities SAMs over range lengths 1-18. is estimated under assumption that...

Abstract Self‐assembled monolayers (SAMs), owing to their unique and versatile abilities manipulate chemical physical interfacial properties, have emerged as powerful nanomaterials for improving the performance of perovskite solar cells (PSCs). Indeed, in last six years, a collection studies has shown that application SAMs PSCs boosts devices compared pristine PSCs. This review describes recent demonstrate direct advantages SAM‐based engineering power conversion efficiency (PCE) includes 1)...

Triboelectric charging involves frictional contact of two different materials, and their electrification usually relies on polarity difference in the triboelectric series. This limits choices materials for pairs, hindering research development energy harvest devices utilizing effect. A progressive approach to resolve this issue modification chemical structures effectively engineering properties. Here, we describe a facile method change property polymeric surface via atomic-level...

Abstract Thermoelectric materials convert waste heat into electricity, making sustainable power generation possible when a temperature gradient is applied. Solar radiation one potential abundant and eco‐friendly source for this application, where side of the thermoelectric device heated by incident sunlight, while other kept at cooler temperature. This known as solar generation. Various are used different applications, methods explored to enhance across material. optical concentrators,...

The fabrication and properties of “fluoroalkylated paper” (“R F paper”) by vapor‐phase silanization paper with fluoroalkyl trichlorosilanes is reported. R both hydrophobic oleophobic: it repels water ( θ app H 2 O >140°), organic liquids surface tensions as low 28 mN m ‐1 , aqueous solutions containing ionic non‐ionic surfactants, complex such blood (which contains salts, biological material cells, proteins, lipids). propensity the to resist wetting a wide range correlates length degree...

Insensitivity: A series of molecules containing a common head group and body as well structurally varied tail groups (-R) has been used in junctions with the structure Ag/S(CH2)4CONH(CH2)2R//Ga2O3/EGaIn to study rates charge transport by tunneling. Changing R over range aliphatic, aromatic, heteroaromatic organic was found not significantly influence rate tunneling (see plots; dashed lines represent calibration standards).

Molecular rectification is a particularly attractive phenomenon to examine in studying structure-property relationships charge transport across molecular junctions, since the tunneling currents same junction are measured, with only change sign of bias, electrodes, molecule(s), and contacts. This type experiment minimizes complexities arising from measurements current densities at one polarity using replicate junctions. paper describes new organic rectifier: having structure...

This paper describes a physical-organic study of the effect uncharged, polar, functional groups on rate charge transport by tunneling across self-assembled monolayer (SAM)-based large-area junctions form Ag(TS)S(CH2)(n)M(CH2)(m)T//Ga2O3/EGaIn. Here Ag(TS) is template-stripped silver substrate, -M- and -T are "middle" "terminal" groups, EGaIn eutectic gallium-indium alloy. Twelve uncharged polar (-T = CN, CO2CH3, CF3, OCH3, N(CH3)2, CON(CH3)2, SCH3, SO2CH3, Br, P(O)(OEt)2, NHCOCH3,...

A challenge in organic thermoelectrics is to relate thermoelectric performance of devices the chemical and electronic structures components inside them on a molecular scale. To this end, reliable reproducible platform relevant molecular-level measurements essentially needed. This paper shows new, efficient approach for characterization large area monolayers using liquid eutectic gallium–indium (EGaIn). cone-shaped EGaIn microelectrode permits access noninvasive, reversible top-contact...

This review provides a comprehensive overview of advances in the last two decades physical-organic studies molecular thermoelectrics.

Abstract Molecular electronics promise electronic devices that are miniaturized to molecular and atomic levels. Despite significant efforts made towards understanding improving the functions of based on homogeneous systems, roles, effects, importance molecular‐level dilution mixing in active components for device performance have only recently begun be understood. Recent advances heterogeneous components, defined as mixed electronics, reviewed, with a particular focus tunnel junctions...

This Communication describes polarity inversion in molecular rectification and the related mechanism. Using a supramolecular engineered, ultrastable, binary-mixed self-assembled monolayer (SAM) composed of an organic diode (SC11BIPY) inert reinforcement molecule (SC8), we probed ratio (r)–voltage relationship over unprecedentedly wide voltage range (up to |3.5 V|) with statistical significance. We observed positive at |1.0 V| (r = 107), followed by disappearance ∼|2.25 V|, then eventual...

ConspectusUnderstanding the thermoelectric effects that convert energy between heat and electricity on a molecular scale is of great interest to nanoscience community. As electronic devices continue be miniaturized nanometer scales, thermoregulation such becomes increasingly critical. In addition, study thermoelectricity provides information cannot accessed through conventional electrical conductance measurements. The field thermoelectrics aims explore in electrode-molecule-electrode tunnel...

The study of molecular wires facilitating long-range charge transport is fundamental interest for the development various technologies in (bio)organic and electronics. Defining nature challenging as electrical characterization does not offer ability to distinguish a tunneling mechanism from other. Here, we show that investigation Seebeck effect provides ability. We examine length dependence coefficient electrografted bis-terpyridine Ru(II) complex films. ranges 307 1027 μV/K, with an...

We report a new photoresist based on multinuclear tin-based macrocyclic complex and its performance for extreme UV (EUV) photolithography. The has trinuclear structure containing three salicylhydroxamic acid ligands six Sn-CH

A supramolecular allosteric catalyst that exhibits a PCR-like cascade reaction is reported. The complex triggered by with an acetate ion, which turns on catalytic exponentially increases ion concentration through acyl transfer reaction.

Abstract Molecular electronics has received significant attention in the last decades. To hone performance of devices, eliminating structural defects molecular components inside devices is usually needed. We herein demonstrate this problem can be turned into a strength for modulating devices. show systematic dilution monolayer an organic rectifier (2,2′‐bipyridine‐terminated n ‐undecanethiolate) with electronically inactive diluents ( ‐alkanethiolates different lengths), gives remarkable...

Interfacial chemistry at organic–inorganic contact critically determines the function of a wide range molecular and organic electronic devices other systems. The is, however, difficult to understand due lack easily accessible in-operando spectroscopic techniques that permit access interfacial structure on scale. Herein, we compare two analogous junctions formed with identical thin film different liquid top-contacts (water droplet vs eutectic gallium indium alloy) elucidate puzzling...

There is a rapidly increasing interest in organic thin film thermoelectrics. However, the power factor of one molecule thick film, self-assembled monolayer (SAM), has not yet been determined. This study describes experimental determination SAMs and its length dependence at an atomic level. As proof-of-concept, composed n-alkanethiolates oligophenylenethiolates different lengths are focused. These were electrically thermoelectrically characterized on identical junction platform using liquid...

This paper addresses the mechanism for rectification in molecular tunneling junctions based on alkanethiolates terminated by a bipyridine group complexed with metal ion, that is, having structure AuTS-S(CH2)11BIPY-MCl2 (where M = Co or Cu) eutectic indium–gallium alloy top contact (EGaIn, 75.5% Ga 24.5% In). Here, AuTS-S(CH2)11BIPY is self-assembled monolayer (SAM) of an alkanethiolate 4-methyl-2,2′-bipyridine (BIPY) head groups, template-stripped gold (AuTS). When SAM exposed to cobalt(II)...