A combination of 1H NMR spectroscopy, DLS, and turbidity measurements reveal that polarizable anions engender both the Hofmeister reverse effects in positand 2. Host 2 possesses two principal distinctly different binding sites: a "soft" nonpolar pocket "hard" crown ammonium cations. spectroscopy reveals anion affinity to sites is comparable, with each site showing characteristic selectivities. also competitively bind induce effect host-guest at very low concentrations (∼2 mM). Furthermore,...

Cellulose nanocrystals (CNCs) are a biorenewable resource, which may be chemically modified to impart specific properties. Modified CNCs have found use in imaging applications, as rheology modifiers, polymer reinforcements, barrier and/or optical films, and nanocomposites. Nanoparticle dimensions of typically 5-10 nm width, with lengths <100-300 nm. However, the physical properties dependent upon number nature surface charge groups imparted during preparation. In case produced from sulfuric...

Cellulose nanocrystals prepared with 1-butyl-3-methylimidazolium chloride ([BMIm]Cl) and HCl, H₂SO₄, or H₃PO₄in a one-pot process under dilute conditions are investigated for changes in CNC dimensions, crystallinity, thermal stability.

There are many open questions regarding the supramolecular properties of ions in water, a fact that has ramifications within any field study involving buffered solutions. Indeed, as Pielak noted (Buffers, Especially Good Kind, Biochemistry, 2021, press. DOI:10.1021/acs.biochem.1c00200) buffers were conceived with little regard to their properties. But there is difficulty here; mathematical models chemists use for affinity determinations do not account screening. As result, uncertainty...

Abstract Nanospaces are ubiquitous in the realm of biological systems and significant interest among supramolecular chemists. Understanding chemical behavior within nanospaces offers new perspectives on phenomena nature opens way to highly unusual selective forms catalysis. Supramolecular chemistry exploits weak, yet effective, intermolecular interactions such as hydrogen bonding, metal‐ligand coordination, hydrophobic effect assemble nano‐sized molecular architectures, providing reactions...

An efficient, four-step synthesis of a range water-soluble, deep-cavity cavitands is presented. Key to this approach are octahalide derivatives (4, X = Cl or Br) that allow water-solubilizing groups be added the outer surface core host structure. In many cases, conversion starting dodecol (1) resorcinarene different avoids any chromatographic procedures.

Science still does not have the ability to accurately predict changes in ligand affinity induced by proximal charged groups.

Abstract Here we describe the synthesis and characterization of a peptide-cellulose conjugate biosensor based on TEMPO-oxidized nanofibrillated cellulose (tNFC) for detecting elevated levels human neutrophil elastase (HNE) in chronic wounds. The fluorescent peptide HNE substrate constructed from n-succinyl-Ala-Pro-Ala-7-amino-4-methyl-coumarin was attached to surface via polyethylene glycol linker. shows high degree incorporation onto with substitution 0.057. relatively small crystallite...

Anions have a profound effect on the properties of soluble proteins. Such Hofmeister effects implications in biologics stability, protein aggregation, amyloidogenesis, and crystallization. However, interplay between important noncovalent interactions (NCIs) responsible for is poorly understood. To contribute to improving this state affairs, we report NCIs anions ammonium guanidinium hosts 1 2, consequences these. Specifically, investigate cavitands designed mimic two prime residues...

Cotton gin waste presents a significant challenge in the cotton ginning industry due to its abundant generation and limited disposal options. In this study, we explored potential of as naturally occurring source material that can synthesize host silver nanoparticles. The noncellulosic constituents served effective reducing agents, facilitating conversion ions into atoms, while porous structure acted microreactor, enabling controlled particle growth. A simple heat treatment powder an aqueous...

A simple method was developed to deposit palladium (Pd) nanoparticles (NPs) within an inexpensive substrate, nonwoven brown cotton fabric, using naturally occurring polyphenols contained the fabric as a reducing agent. The Pd NPs were imbedded fiber's cross-sectional area. Pd-impregnated substrate applicable in series of Suzuki–Miyaura cross-coupling reactions, wherein product yields affected by steric hindrance and aryl halide selection; para-substituted iodoaryl reactants provided greatest...

Peptide-cellulose conjugates designed for use as optical protease sensors have gained interest point-of-care (POC) detection. Elevated serine levels are often found in patients with chronic illnesses, necessitating optimal biosensor design POC assessment. Nanocellulose provides a platform transducer surface, and the employment of nanocellulose this capacity combines its biocompatibility high specific surface area properties to confer sensitive detection dilute biomarkers. However, basic...

Azo dyes are commonly used in textile color processing for their wide array of vibrant colors. However, recent years these have become concern wastewater management given toxicity to humans and the environment. In present work, researchers remediated water contaminated with azo using silver nanoparticles (Ag NPs) intercalated within cotton fabric as a catalyst, enhanced durability reusability, reductive degradation method. Three dyes—methyl orange (MO), Congo red (CR), Chicago Sky Blue 6B...

Lysine-containing polymers have seen broad application due to their amines' inherent ability bind a range of biologically relevant molecules. The synthesis multiple generations polyester dendrimers bearing lysine groups on periphery is described in this report. Their hydrolytic stabilities with respect pH and time, toxicity cell lines, possible as nano-detoxification agents organophosphate compounds are all investigated. These zeroth-, first-, second-generation water-soluble been designed...

We describe the use of a supramolecular nano-capsule for selective protection cis- and trans-C18 mono-unsaturated fatty-acid esters. In contrast to earlier studies revealing that smaller esters is dictated by affinity, these larger was found be dependent on packing motif guest.

Inflammatory disease biomarker detection has become a high priority in point-of-care diagnostic research relation to chronic wounds, with variety of sensor-based designs becoming available. Herein, two primary aspects biosensor design are examined: (1) assessment cellulose nanofiber (CNF) matrix derived from cotton ginning byproducts as sensor transducer surface; and (2) the spacer length morphology between CNF backbone peptide fluorophore function activity for porcine pancreatic human...

In this study, the application of a novel polymer-supported Cu

Currently, there is an increasing interest in the use of biopolymers industrial applications to replace petroleum-based additives, since they are abundantly available, renewable and sustainable. Cottonseed protein a biopolymer that, when used as modifier, has shown improved performance for wood adhesives paper products. Thus, it would be useful explore feasibility using cellulose nanomaterials further improve cottonseed strength agent. This research characterized isolate with/without...