Abstract Whether the presence of adsorbates increases or decreases thermal conductivity in metal-organic frameworks (MOFs) has been an open question. Here we report observations transport framework HKUST-1 various liquid adsorbates: water, methanol, and ethanol. Experimental thermoreflectance measurements were performed on single crystals thin films, theoretical predictions made using molecular dynamics simulations. We find that by 40 – 80% depending adsorbate, a result cannot be explained...

We experimentally and theoretically investigate the thermal conductivity mechanical properties of polycrystalline HKUST-1 metal-organic frameworks (MOFs) infiltrated with three guest molecules: tetracyanoquinodimethane (TCNQ), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), (cyclohexane-1,4-diylidene)dimalononitrile (H4-TCNQ). This allows for modification interaction strength between host, presenting an opportunity to study fundamental atomic scale mechanisms how molecules...

The quality of emission spectra metal complexes gives good insights into their performance in many optoelectronic applications. Herein, the effect number and position various ligand structures on Ru bipyridine was studied. Specifically, use a different withdrawing groups (COOH) investigated detail. were first using density functional theory (DFT) time‐dependent DFT calculations then confirmed experimentally. bandgap energy, reactivity, Stokes shift found to depend attached Ru(bpy) 2 2+...

In this work highly oriented Surface Anchored Metal-Organic Framework (SURMOF) films were fabricated quasi-epitaxial and electrically characterized by Seebeck analysis benchmarked against random polycrystalline MOF loaded with tetracyano-quinodimethane (TCNQ) infiltration. The horizontal coefficient of the SURMOF parallel to sample surface was measured has been discussed. isotropic exhibit a high positive 422.32 μV/K at 350 K. However, fluctuates around 0 instead. Because are anisotropic,...

For the first time, a complete thermoelectric characterization of PEDOT:PSS thin films is performed with novel lab‐on‐a‐chip measurement platform, which Is developed for nearly simultaneous in‐plane ZT characterization. The electrical conductivity, Seebeck coefficient, thermal and consequently power factor values as function temperature in single run experimentally determined. A clear correlation found between film thickness properties. While conductivity increases decreasing thickness,...

To conduct a clinical biochemical study that aids in investigation of some non-coding RNA expressions and polymorphisms (including long RNAs miRNAs) namely, MALAT-1 miR-9 attempt to provide new diagnostic biomarkers vitiligo patients for Egyptians. Twenty having other twenty apparently controls were included this study. Serum biopsy taken where classified into lesional peri-lesional groups. Laboratory pathological investigations assessed. long-non coding measured. Vitiligo had mean age...

Abstract Metal–organic frameworks (MOFs) have gained a large amount of interest because their periodic and modular structure. These features allow easy prediction the physical chemical properties an organic chromophore, acting as linker in MOF. In present work, bianthryl (BA) equipped with metal‐coordinating carboxylate groups, is studied to construct photoluminescent Zn‐BA surface‐anchored MOF (SURMOF) thin film. The SURMOF, response prolonged UV light irradiation under ambient conditions,...

The most common gas sensors are based on chemically induced changes in electrical resistivity and necessarily involve making imperfect contacts to the sensing materials, which introduce errors into measurements. We leverage thermal- chemical-induced microwave propagation characteristics (i.e., S-parameters) compare ZnO surface-anchored metal–organic-framework (HKUST-1 MOF) thin films as materials for detecting ethanol vapor, a typical volatile organic compound (VOC), at low temperatures....

Gas-phase infiltration of the carbonylchloridogold(I), Au(CO)Cl precursor into pores HKUST-1 ([Cu3(BTC)2(H2O)2], Cu-BTC) SURMOFs (surface-mounted metal-organic frameworks; BTC = benzene-1,3,5-tricarboxylate) leads to decomposition within MOF through hydrolysis with aqua ligands on Cu. Small Aux clusters an average atom number x ≈ 5 are formed in medium-sized matrix. These gold nanoclusters homogeneously distributed and crystallographically ordered, which was supported by simulations powder...

Volatile Organic Compounds (VOCs) encompass a very wide range of organic compounds characterized by high vapor pressure at lower temperatures, which gives them significant volatility already room temperatures. They are present in the living and work environments. Long-term indoor exposure to VOCs can cause fatigue, headache, nausea, eye, nose, throat irritation sensitive persons, but also damage central nervous system other organs. Because their widespread occurrence our environment, there...

This investigation on metal-organic framework (MOF) HUKUST-1 films focuses comparing the undoped pristine state and with case of doping by TCNQ infiltration MOF pore structure. We have determined temperature dependent charge transport andp-type conductivity for HKUST-1 films. Furthermore, electrical current-voltage characteristics been characterized in detail. Because most common forms MOFs, bulk powders, do not lend themselves easily to characterization investigations, here this study...

We describe a non-conventional, MOF-based approach with modified linkers to fabricate 3D Bi2O3 supracrystals. The nanoparticle (NP) assembly exhibits bcc-packing, which is difficult achieve other methods. NPs possess very narrow size distribution. individual were synthesized inside the pores of surface-mounted metal-organic framework (SURMOF) template via photo-decomposition procedure. supracrystals thoroughly characterized using X-ray diffraction (XRD), infrared (IR) and Raman spectroscopy...

We leveraged chemical-induced changes to microwave signal propagation characteristics (i.e., S-parameters) characterize the detection of aliphatic alcohol (methanol, ethanol, and 2-propanol) vapors using TCNQ-doped HKUST-1 metal-organic-framework films as sensing material, at temperatures under 100 °C. show that sensitivity depends on oxidation potential analyte, impedance setup analyte-loading medium. The microwaves-based technique can also afford new mechanistic insights into VOC...

A new class of thermoelectric materials termed surface-anchored (metal-organic frameworks and coordination network compounds) SURMOFs thin films will be introduced. demonstrates promising application potential organic porous in future electronic devices working highly efficient the RT (Room Temperature) region. In our first studies we have characterized Seebeck coefficient polycrystalline highly-ordered SURMOF films. 1,2 Since are size their pores adjustable, they can further functionalized...

Bulk Metal-Organic-Framework (MOF) films are designed scaffold-like compounds which composed by inorganic metal clusters connected with organic linker molecules, forming highly ordered, crystalline and porous structures. These bulk MOF frameworks were initially for gas storage due to their high capacity inside the pores of materials. However, application electrical devices very limited resulting from insulating character. Recently, it has been reported that properties host MOFs can be...

Bulk Metal-organic-framework (MOF) materials are designed scaffold-like compounds that consist of metal ions connected by organic ligands, forming highly ordered porous structures. MOFs yield typically powders with micron sized crystallites, which limit their applications. Many practical applications require instead suitably uniform MOF films. In recent years, efforts to grow oriented Surface Anchored Metal-Organic Framework (SURMOF) films Cu 3 (BTC) 2 (BTC: benzenetricarboxylic acid), known...

Bulk Metal-organic-framework (MOF) materials are designed scaffold-like compounds that consist of metal ions connected by organic ligands, forming highly ordered porous structures. MOFs yield typically powders with micron sized crystallites, which limit their applications. Many practical applications require instead suitably uniform MOF films. In recent years, efforts to grow oriented Surface Anchored Metal-Organic Framework (SURMOF) films Cu 3 (BTC) 2 (BTC: benzenetricarboxylic acid), known...

Seebeck meaurements have been performed on i) quasi-liquid epitaxially highly oriented HKUST-1 Surface Anchored Metal-Organic Framework (SURMOF) films and for comparison ii) random polycrystalline thin films; pristine as well loaded with tetracyanoquinodimethane (TCNQ). However, the horizontal coefficient of (001) SURMOF is practically around 0 µV/K there no measurable carrier transport parallel to surface. Only in exhibit a high positive 422.30 at 330 K. For TCNQ lowering 388.80 The...

Bulk Metal-organic-framework (MOF) films are designed scaffold-like compounds that consist of metal ions connected by organic ligands in the form crystalline powders, while Surface Anchored (SURMOF) quasi-liquid phase epitaxially grown highly ordered films. The ability to conduct electrical charge is one most important but least understood properties MOF and coordination network materials. Very little work exists on characterization films, because early synthesized pristine exhibited mostly...

SURMOF based "Designer Solids" and Organic thin film materials will be presented as non-volatile RRAM Devices. Additionally a fully thermoelectric characterization have been performed on ZT Test Cips (from Linseins Messgeraete GmbH). Thermoeletric Properties Seebeck measurements of pristine loaded films presented.

Metal organic frameworks (MOFs) are a fascinating class of materials that is currently investigated in the context many applications. The large size chemical space these systems, comprising linkers connected by metal centers, precludes an exhaustive experimental search for optimal materials. For this reason, variety modeling tools, ranging from structure-generators to electronic structure methods has been applied understand and increasingly predict their function. Here we review some recent...

MOFs are of great interest for applications in gas storage, separation, catalysis and more recently, thermoelectrics (TE) due to their extremely high porosity (surface area), large chemical mechanical tailorability defined by the choice metal node, organic ligand, infiltrated guest molecules, low thermal conductivities. In particular, new emergent properties, such as electronic conductivity energy transfer, have been achieved infiltrating MOF pores with specialized ‘guest’ molecules. The...

Metal-organic frameworks (MOFs) are porous and crystalline Coordination Network Compounds (CNCs), also referred to as coordination polymers (PCPs), which consist of inorganic metal (or metal/oxo) clusters connected by organic linkers. Surface Anchored Metal-organic-framework (SURMOF) films quasi-liquid phase epitaxially grown highly ordered MOF films. For this study we used Cu 3 (BTC) 2 (BTC: benzene tricarboxylate) films, known HKUST-1 (Hong Kong University Science Technology-1), were...