Elizaveta Ermakova

• PhD
• Senior Researcher at Frumkin Institute of Physical Chemistry and Electrochemistry

Water-soluble porphyrins have garnered significant attention due to their broad applications in biomedicine, catalysis, and material chemistry. In this work, water-soluble platinum(II) and palladium(II) complexes with porphyrins bearing ethyl phosphonate...

The fabrication of porphyrin-based 2D materials is of great interest because they are valuable in molecular electronics, photovoltaic cells, thermoelectric energy harvesting, gas sensory and medicine. In this work, interfacial...

The detection of volatile organic compounds (VOCs) is a rapidly growing research area due to the importance of VOCs in environmental pollution, human health assessment, food quality control, and homeland security. Optical sensing materials based on porphyrins are particularly appealing for VOCs detection, owing to availability of porphyrins, their...

Detection of volatile organic compounds (VOCs) is a rapidly growing research area due to importance of VOCs in environmental pollution, human health assessment, food quality control, and homeland security. Optical sensing materials based on porphyrins are particularly appealing for VOCs detection, owing to availability of porphyrins, their exceptio...

The development of luminescent molecular materials has advanced rapidly in recent decades, primarily driven by the synthesis of novel emissive compounds and a deeper understanding of excited-state mechanisms. Herein, we...

This work is focused on the age-old challenge of developing optical sensors for acidity measurements in low-pH aqueous solutions (pH < 5). We prepared halochromic (3-aminopropyl)amino-substituted quinoxalines QC1 and QC8 possessing different hydrophilic–lipophilic balance (HLB) and investigated them as molecular components of pH sensors. Embedding...

The β-substituted porphyrinoids commonly used to form functional assembled systems in nature yet are still scarcely used in material chemistry probably due to the laborious synthesis of these compounds. In this work, β-octa[(4-diethoxyphosphoryl)phenyl]porphyrin (2HOPPP) and its metal (Zn(II), Cd(II), Cu(II), and Ni(II)) complexes were prepared in...

In recent years, the study of niosomes as nanocarriers alternative to liposomes has received increasing attention. In contrast to well-studied liposome membranes, many aspects of the behavior of analogous niosome bilayers have not been studied. This paper considers one of these aspects related to the communication between the physicochemical proper...

This research is focused on the development of pH indicators based on the quinoxaline signaling group for acidic aqueous solutions (pH 1–5). A push–pull quinoxaline QC1 in which two electron-donating (3-aminopropyl)amino substituents are attached to positions 6 and 7 of the electron-deficient quinoxaline moiety was prepared using the palladium-cata...

This work deals with the development of ultrathin film nanosensors for selective and sensitive detection of toxic Hg²⁺ cations in aqueous media. 1,8-Bis[(2-aminoethyl)amino]anthraquinone D0 was functionalized by alkoxy groups of different length to prepare ligands D3 and D12 with linear arrangement of two polyamine receptors and two lipophilic alky...

Reusable dual-channel optical sensors for Hg²⁺ ions were prepared by Langmuir-Schaefer (LS) method from amphiphilic (trans-A2)BC-type porphyrins functionalized at meso-positions of the tetrapyrrolic macrocycle by sterically demanding diethoxyphosphoryl and mesityl groups as well as electron donating RO, RS or RNH substituents (R = n-C8H17). These t...

Domestic and foreign literature on methods for obtaining graphene and its derivatives [graphene oxide (GO) and reduced GO] as representatives of the family of 2D layered materials is analyzed. Particular attention is paid to GO. Great potential of post-synthetic modification as well as unique properties of the material and its derivatives make them...

A versatile synthetic approach to accessing unsymmetrically substituted (trans‐A2)BC‐type porphyrins bearing two heteroatoms at the macrocycle periphery is developed. For this purpose, experimental conditions for the substitution of the bromine atom in zinc 5‐bromo‐15‐(diethoxyphosphoryl)‐10,20‐diphenylporphyin (2) by S‐, O‐, and N‐nucleophiles wer...

Fabricating of solid-supported hybrid nanostructures remains a challenging problem because it is difficult to control all interfacial interactions influencing the structure and stability of these systems. The most widely used approach to solving this problem is a bottom-up assembly on the surface templates such as self-assembled monolayers (SAMs)....

Fabrication of graphene-based surface coatings through self-assembly may provide an affordable alternative to chemical vacuum deposition. Herein, we exploited the self-assembly of graphene oxide at the oil/water interfaces to form monolayers of 2D carbons on solid surfaces with different surface energy. We showed that interfacial monolayers with co...

This work presents an original approach to obtaining highly sensitive ultrathin film sensors that allows molecular design of surface–active modular molecules by completing a signal anthraquinone block with hydrophobic radicals and polar receptor groups, with their number and size provided in accordance with the sensor type. An important advantage o...

The feasibility of using an amphiphilic photoactive derivative of aminoanthraquinone (C18) as both a local solvatochromic probe reporting its position in a micelle and a component of an analytical supramolecular unit in mixed micelles based on a nonionic surfactant, Triton X100, has been considered. The solvatochromism of the 1,8-anthraquinone deri...

Porphyrin-based coordination networks were assembled in Langmuir monolayers. Metalation/demetalation reactions were monitored by fiber-optic spectroscopy. Mechanism of porphyrin metalation varies in solution and thin film at the interface. Solid-immobilized films of coordination 2D network were obtained and studied.

Herein, we describe a new strategy for the formation of bilayer porphyrin-graphene templates to initiate the assembly of various organic or hybrid films including surface metal-organic frameworks on solid substrates. This strategy involves a one-step assembly of a bilayer from the ordered monolayer of functionalized porphyrin and the adsorption lay...

An innovative design of reusable SPR chips allowing the quantitative and selective determination of mercury(II) at ppt level is reported.

Metal-ligand supramolecular coordination at the air/water interface offers a route to generate highly ordered 2D multichromophore architectures for fabricating film-like surface attached metal organic frameworks (SURMOF) for applications in electronics, photonics and chemical sensing. Metal complexes of tetrapyridyl porphyrins (TPyP) are well known...

A new paradigm is described that allows one to create different types of sensors: from highly sensitive ones to practical household devices. Our approach relies on modular molecular receptors incorporating an intensely-colored aminoanthraquinone signaling unit equipped with both hydrophilic and hydrophobic modules, the number and size of which bein...

A pentaazamacrocycle incorporating an intracyclic anthraquinone fragment (PENTAQ) was synthesized with the aim of forming metal-responsive Langmuir monolayers. PENTAQ allows a good discrimination by naked eye of copper ions in methanol/water solutions (50:50 v/v). Spectrophotometric investigations of the protonation and Cu2+ binding properties of P...

A new colorimetric molecular sensor allowing for cheap, fast, sensitive, and highly selective naked-eye detection of Hg(2+) in water is described. This molecule combines a 1,8-diaminoanthraquinone signaling subunit and phosphonic acid esters that confer the water solubility to the dye (R = H). A ready-to-use colorimetric solid sensor was obtained b...