Multiscale Solvation Effect on Reactivity of β-O-4 of Lignin Dimers in Deep Eutectic Solvents

2021 ◽  
Author(s):  
Qi Qiao ◽  
Jian Shi ◽  
Qing Shao
Keyword(s):  
Deep Eutectic Solvents ◽  
Solvation Effect ◽  
Critical Question

Deep eutectic solvents (DESs) emerge as a medium to enhance the depolymerization of lignin. One critical question is how the solvation of DES molecules may affect the reactivity of lignin....

Probing the Structural Features and the Micro-heterogeneity of Various Deep Eutectic Solvents and their Water Dilutions by the Photophysical Behaviour of Two Fluorophores

2020 ◽  
Author(s):  
Matteo Tiecco ◽  
Irene Di Guida ◽  
Pier Luigi Gentili ◽  
Raimondo Germani ◽  
Carmela Bonaccorso ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Deep Eutectic Solvents ◽  
Structural Features ◽  
Solvation Dynamics ◽  
Structured Systems ◽  
Reduced Viscosity ◽  
Bond Network ◽  
Fluorescent Molecules

<div><div><div><p>The structural features of a series of diverse Deep Eutectic Solvents (DESs) have been investigated and characterized by means of two fluorescent probes. The spectral and photophysical properties of the latter are strictly dependent on the experienced environment, so that they can provide insights into the polarity, viscosity, hydrogen-bond network, and micro-heterogeneity of the various DESs.</p><p>In fact, the investigated DESs exhibit a variety of properties with regards to their hydrophilicity, acidity, and hydrogen-bond ability, and these details were deeply probed by the two fluorescent molecules. The effect of the addition of water, which is a key strategy for tuning the properties of these structured systems, was also tested. In particular, the excited state dynamics of the probes, measured by femtosecond-resolved transient absorption, proved instrumental in understanding the changes in the structural properties of the DESs, namely reduced viscosity and enhanced heterogeneity, as the water percentage increases. Differences between the various DESs in terms of both local microheterogeneity and bulk viscosity also emerged from the peculiar multi-exponential solvation dynamics undergone by the excited states of the probes.</p></div></div></div>

Probing the Structural Features and the Micro-heterogeneity of Various Deep Eutectic Solvents and their Water Dilutions by the Photophysical Behaviour of Two Fluorophores

2020 ◽  
Author(s):  
Matteo Tiecco ◽  
Irene Di Guida ◽  
Pier Luigi Gentili ◽  
Raimondo Germani ◽  
Carmela Bonaccorso ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Deep Eutectic Solvents ◽  
Structural Features ◽  
Solvation Dynamics ◽  
Structured Systems ◽  
Reduced Viscosity ◽  
Bond Network ◽  
Fluorescent Molecules

<div><div><div><p>The structural features of a series of diverse Deep Eutectic Solvents (DESs) have been investigated and characterized by means of two fluorescent probes. The spectral and photophysical properties of the latter are strictly dependent on the experienced environment, so that they can provide insights into the polarity, viscosity, hydrogen-bond network, and micro-heterogeneity of the various DESs.</p><p>In fact, the investigated DESs exhibit a variety of properties with regards to their hydrophilicity, acidity, and hydrogen-bond ability, and these details were deeply probed by the two fluorescent molecules. The effect of the addition of water, which is a key strategy for tuning the properties of these structured systems, was also tested. In particular, the excited state dynamics of the probes, measured by femtosecond-resolved transient absorption, proved instrumental in understanding the changes in the structural properties of the DESs, namely reduced viscosity and enhanced heterogeneity, as the water percentage increases. Differences between the various DESs in terms of both local microheterogeneity and bulk viscosity also emerged from the peculiar multi-exponential solvation dynamics undergone by the excited states of the probes.</p></div></div></div>

Die kybernetische (Neu-)Ordnung

2020 ◽  
Vol 96 (1) ◽  
pp. 73-88
Author(s):  
Martin Karcher
Keyword(s):  
Educational Research ◽  
Research Governance ◽  
Critical Question ◽  
Central Thesis ◽  
Empirical Educational Research ◽  
Key Features

Abstract The New Cybernetic Order. Thoughts on the Cybernetic Governing of Education After an attempt to determine key features of cybernetics (Chapter 1) and the consideration of the conditions of the cybernetization of the present (Chapter 2) the article takes a closer look at three fields (Chapter 3): empirical educational research, governance and finally the cybernetic self. The three areas coincide in the critical question of the controllability of pedagogical processes and mutually condition and legitimise each other. The central thesis is that these fields are closely connected and that cybernetization of education entails a depoliticization (Chapter 4).

THE FUTURE OF CORPORATE REPORTING REFLECTIONS ON THE CRITICAL QUESTION OF THE NECESSITY OF FORWARD-THINKING PHILOSOPHY AND CULTURE OF REPORTING WORLDWIDE

2018 ◽  
Vol 28 (5) ◽  
pp. 1455-1466
Author(s):  
Hristina Oreshkova
Keyword(s):  
Financial Reporting ◽  
Biological Diversity ◽  
Radical Change ◽  
Green Economy ◽  
Critical Question ◽  
Corporate Reporting ◽  
Global Problems ◽  
The Future ◽  
Strategic Goals

Over the most recent decades corporate reporting has proved to be essential to achieving the strategic goals of humankinds and the ever-increasing necessity of truthful information and transparency. Corporate reporting is a socially significant process and practice. The quality of corporate reporting reflects the degree of relevance of the manner enterprises and businesses communicate with the surrounding world and environment (natural or industrial) and millions of people concerned – societies, present and future generations, employees, workers, and many other people, and other living beings. On most authoritative international scientific forums – symposia, conferences, congresses, assemblies, summit meetings and events, conducted in Europe and worldwide, it is pompously declared that corporate reporting should provide useful and reliable information both financial and non-financial one. The responsibilities of accountability and stewardship seem out to be of great importance to the fulfillment of the strategic goals of our centuries.The belief of the author is that the simultaneous analysis of the global problems challenging humankinds such as climate changes, destruction of biological diversity on the Planet, the matter of the necessity of actions of creating Green Ethics and Green Economy worldwide, the increasing need for combined and well-coordinated efforts in the combat supporting the eradication of poverty globally, and the relevance of corporate reporting to solving these unique problems the mankind is facing, would highlight and confirm their intricate interrelation (the key aim of the present research), consequently rendering the debate on the future of corporate reporting more meaningful and constructive. The debate would most probably promote the standpoint we personally maintain, which is also endorsed by an increasing number of supporters in Europe and around the world, implying in particular that apart from a process of unification and reduction of essential differences in the international financial reporting, what is also necessary is the radical change in the philosophy and culture of corporate reporting and presentation. Undeniably, it includes revealing of the financial state and the substantial effects and impacts of the businesses operating activities in a straightforward manner, as complete insights and understanding of the broader and far-reaching goals to which the corporate reporting must be subordinated – at present and in the long-lasting future.

Solvation and redox properties of [Co(en)3]3+-[Co(en)3]2+ system

1980 ◽  
Vol 45 (2) ◽  
pp. 335-338 ◽  
Author(s):  
Adéla Kotočová ◽  
Ulrich Mayer
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Specific Interaction ◽  
Redox Properties ◽  
Solvation Effect ◽  
Interacting Particles ◽  
Acid Base ◽  
Polar Solvents ◽  
Oxidation Reduction ◽  
Solvent Molecules

The solvation effect of a number of nonaqueous polar solvents was studied on the oxidation-reduction properties of the [Co(en)3]3+-[Co(en)3]2+ system. Interactions of these ions with the solvent molecules are discussed in terms of their coordination, which is accompanied by a specific interaction of the Lewis acid-base type, namely formation of a hydrogen bond between the interacting particles. This is the main controlling factor of the redox properties of the studied system.

Is Healthcare Special?

2018 ◽  
Author(s):  
Gordon Moore ◽  
John A. Quelch ◽  
Emily Boudreau
Keyword(s):  
Consumer Choice ◽  
Special Relationship ◽  
Individual Choice ◽  
Health Consequences ◽  
Critical Question ◽  
The Past ◽  
Different Types ◽  
Collective Benefit ◽  
Patient Ethics

Chapter 2 asks the critical question of whether healthcare is different from other consumer-driven markets. In the past, many pushed back on the notion that healthcare could be a consumer-driven industry, arguing that it is fundamentally different from other markets. This chapter acknowledges and reviews these critiques, highlighting four areas that might present challenges to increasing consumer choice in healthcare: the special relationship between doctor and patient, ethics and morality, individual choice versus collective benefit, and the health consequences of consumer choice. In doing so, this chapter also presents a schematic for thinking about the different types of healthcare choices, arguing that not all choices are equal and consumers may be more prepared to make decisions in some areas as opposed to others. In presenting the counterargument to consumer choice, this chapter asks the reader to consider the drawbacks and potential limitations of consumer choice in healthcare.

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