Exploring Functional Polymers in the Synthesis of Luminescent ZnO Quantum Dots for the Detection of Cr6+, Fe2+, and Cu2.

The main aim of this work is to demonstrate that well-defined methacrylate-based copolymers with oligoethylene glycol side chains and functional groups such as thiol and glycidyl, obtained by photo-initiated reversible addition-fragmentation chain transfer (RAFT) in ethanol, are highly suitable as templates in the synthesis and protection of ZnO quantum dots (ZnO QDs) with remarkable photoluminescent properties. While the affinity of thiol groups to metallic surfaces is well established, their interaction with metal oxides has received less scrutiny. Furthermore, under basic conditions, glycidyl groups could react with hydroxyl groups on the surface of ZnO, representing another strategy for hybrid synthesis. The size and crystalline morphology of the resulting hybrids were assessed using DLS, TEM, and XRD, indicating that both polymers, even with a low proportion of functional groups (5% mol) are appropriate as templates and ligands for ZnO QDs synthesis. Notably, thiol-containing polymers yield hybrids with ZnO featuring excellent quantum yield (up to 52%), while polymers with glycidyl groups require combination with the organosilane aminopropyl triethoxysilane (APTES) to achieve optimal results. In both cases, these hybrids exhibited robust stability in both ethanol and aqueous environments. Beyond fundamental research, due to the remarkable photoluminescent properties and affordability, these hybrid ZnO QDs are expected to have potential applications in biotechnology and green science; in particular, in this study, we examined their use in the detection of environmental contaminants like Fe2+, Cr6+, and Cu2+. Specifically, the limit of detection achieved at 1.13 µM for the highly toxic Cr6+ underscores the significant sensing capabilities of the hybrids.

RAFT Hydroxylated Polymers as Templates and Ligands for the Synthesis of Fluorescent ZnO Quantum Dots.

The remarkable photoluminescent properties, biocompatibility, biodegradability, and antibacterial properties of zinc oxide quantum dots (ZnO QDs) coupled with their low cost and nanoscale size guarantee bio-related and technological applications. However, the effect of the polymeric ligand during synthesis has hardly been investigated compared to other less environmentally friendly QDs. Thus, the objective of this work was to focus on the synthesis of fluorescent hybrid ZnO QDs by the sol-gel method using different polymers with hydroxyl groups as templates and ligands to obtain stable particles in different media. For this purpose, well-defined hydroxylated statistical polymers and block copolymers were synthesized using reversible-addition fragmentation chain transfer (RAFT) polymerization to establish the influence of molecular weight, hydrophobic/hydrophilic balance, and polymer architecture on the colloidal and photophysical properties of the synthesized hybrid ZnO QDs. Dynamic light scattering (DLS), TEM, and X-ray diffraction measurements indicated the formation of stable nanoparticles of a few nanometers. A remarkable enhancement in terms of fluorescence was observed when ZnO QDs were synthesized in the presence of the hydroxylated homopolymers and even more so with block copolymers architecture. Organosilanes combined with the hydroxylated polymers were used to improve the colloidal stability of ZnO QDs in aqueous media. These samples exhibited uniform and stable enhanced photoluminescence for nearly five months of being investigated. Among other applications, the hybrid ZnO QDs synthesized in this work exhibit high selectivity to detect Cr6+, Fe2+, or Cu2+ in water.

Índice de valor social añadido: una propuesta para analizar la eficiencia hospitalaria / Social value added index: a proposal for analyzing hospital efficiency

OBJETIVO: El objetivo de este trabajo es demostrar que es posible monetizar el valor social que genera un hospital y que con su análisis podemos establecer una perspectiva diferente para analizar la eficiencia del gasto público. MÉTODO: Utilizando el método del caso se ha seleccionado un hospital público en España. Es idóneo por dos razones: primero, porque su actividad es pequeña y esto facilita el diálogo con los stakeholders; y segundo, como es un hospital de carácter residencial, permite realizar una experiencia de aproximación de la contabilidad social en hospitales sencilla, modificable y que es posible testar. RESULTADOS: Se establece la traducción monetaria de la actividad de un hospital, incluyendo la parte social de las transacciones económicas (mercado), las variables que no han supuesto transacción económica, pero han sido percibidas y valoradas por los stakeholders (no mercado), y la satisfacción de los stakeholders (emocional). Este valor socioemocional asciende a aproximadamente 60 millones de euros anuales para el periodo de 2013 a 2017. CONCLUSIONES: El valor social generado para los stakeholders, y su monetización, permiten gestionar de forma más eficiente las decisiones hacia el propósito social de los hospitales públicos. En concreto, el índice de valor social añadido puede ser una herramienta para la eficiencia social del hospital, ya que se establece cuánto valor social genera a partir de la financiación pública que le han asignado. Así, la disminución de este valor en los últimos años denota un problema que, sin este análisis con perspectiva social y desde los stakeholders, no podría haberse detectado

OBJECTIVE: The objective of this paper is to demonstrate that it is possible to monetize the social value generated by a hospital and use it to establish a different perspective to analyze the efficiency of public spending. METHOD: A public hospital in Spain was selected using the case method. It is suitable for two reasons; first, the hospital activity is small and therefore dialogue with stakeholders is easy; and second, as it is a hospital of a residential nature, it allows an easy, modifiable and testable approximation of social accounting in hospitals. RESULTS: It establishes the monetary translation of the activity of a hospital, including the social part of the economic transactions (market), the variables that have not been created based on economic transaction, but have been perceived and valued by the stakeholders (not market), and the satisfaction of the stakeholders (emotional). This socio-emotional value amounts to approximately 60 million Euros per year from 2013 to 2017. CONCLUSIONS: The social value generated for the stakeholders, and its monetization, allows more efficient management of decisions towards the social purpose of public hospitals. In particular, the social value added index can be a tool for the social-efficiency of hospitals, as it establishes how much social value it generates from the public funding allocated to it. Thus, the decline in this value in recent years denotes a problem that, without this analysis with a social perspective and from the stakeholders, could not have been detected

Is It Possible to Monetarily Quantify the Emotional Value Transferred by Companies and Organizations? An Emotional Accounting Proposal.

Social accounting focuses on value transactions between organizations and their stakeholders; both market ones, where the value perceived by the different stakeholders is identified, and non-markets ones, where transactions are monetized at their fair value. There was long awareness of an emotional value translation, linked to the transfer of different products, services, remunerations, and incentives, regardless of whether they were market or non-market. Yet that emotional value seemed to be anchored in the field of psychology and managed to elude economic science. This study seeks to identify emotional value with consumer surplus and, by extension, of the other stakeholders in a value transfer process. This proposal allows the emotional value to be anchored in the micro-economy and allows it to be objectively calculated using a regression involving three elements: the market price, the fair value interval, and a perceived satisfaction score by the different stakeholders in the form of significant sampling. The result obtained not only allows Social Accounting to be complemented with emotional value, but it also facilitates its incorporation in the strategy to optimize the emotional value. Furthermore, it enables a quantification of the perceived subjective utility, which opens up a research path where some possible lines are clearly identified.

[Social value added index: a proposal for analyzing hospital efficiency]. / Índice de valor social añadido: una propuesta para analizar la eficiencia hospitalaria.

OBJECTIVE: The objective of this paper is to demonstrate that it is possible to monetize the social value generated by a hospital and use it to establish a different perspective to analyze the efficiency of public spending. METHOD: A public hospital in Spain was selected using the case method. It is suitable for two reasons; first, the hospital activity is small and therefore dialogue with stakeholders is easy; and second, as it is a hospital of a residential nature, it allows an easy, modifiable and testable approximation of social accounting in hospitals. RESULTS: It establishes the monetary translation of the activity of a hospital, including the social part of the economic transactions (market), the variables that have not been created based on economic transaction, but have been perceived and valued by the stakeholders (not market), and the satisfaction of the stakeholders (emotional). This socio-emotional value amounts to approximately 60 million Euros per year from 2013 to 2017. CONCLUSIONS: The social value generated for the stakeholders, and its monetization, allows more efficient management of decisions towards the social purpose of public hospitals. In particular, the social value added index can be a tool for the social-efficiency of hospitals, as it establishes how much social value it generates from the public funding allocated to it. Thus, the decline in this value in recent years denotes a problem that, without this analysis with a social perspective and from the stakeholders, could not have been detected.

Social Accounting as an Enabling Tool to Develop Collective Organizational Citizenship Behavior in the Diocese of Bilbao.

Religious oriented organizations (ROOs) have frequently higher levels of motivation among their employees, because the aims of ROOs and those of collaborators and stakeholders are usually aligned. However, sometimes, when the management of ROOs becomes professionalized, tensions between aims and efficiency are more frequent, and productivity levels start to decline. The most widespread current management theories are focused on profit maximization and are not especially helpful to religious organizations which try to enhance their productivity levels and, at the same time, achive their mission and aims. In order to fill this gap, in this research, we will develop two main concepts: social accounting and organizational citizenship behavior (OCB). We will propose the use of social accounting to calculate the social value generated by ROOs and, from that point, build new indicators able to measure the organizational citizenship behavior (OCB) of collaborators working in ROOs. We will exemplify this theoretical development with the actual case of the diocese of Bilbao. In short, the main objectives of this work are two. The first objective is the development of a theoretical framework able to enhance the levels of social value creation inside religious (and socially oriented) organizations using social accounting. The second objective is the use of data from the 16 educative centers of the diocese of Bilbao to ilustrate that social accounting is a valid tool to measure social value. Additionally, we will show that social accounting can be a tool to assess management decisions in order to enhance organizational and individual OCB in ROOs and, in this way, generate moral satisfaction for employees and collaborators in their organizations.