Photochromism and Solid State Photoluminescence of Bi and Pb Complexes and Coordination Polymers based on N-R-4,4’-bipyridinium entities (R= O-, CH3, CH2CN,…)

Date du colloque : 06/2013</p

Characterization and analysis of azimuthally sensitive correlations

A unified framework for describing the azimuthal dependence of two-particle correlations in heavy-ion collisions is introduced, together with the methods for measuring the corresponding observables. The generalization to azimuthal correlations between more than two particles is presented.Comment: 7 pages; talk given at Hot Quarks 2004, Taos (NM), July 18-24,200

The Bologna process and its perspectives

At the end of the first decade of this new millennium, we have reached the deadline set for the Bologna process. It is therefore an appropriate moment to look back to see where we have progressed and where we have fallen short of our aspirations. The Bologna Process was a major reform created with the claimed goal of providing responses to issues such as the public responsibility for higher education and research, higher education governance, the social dimension of higher education and research, and the values and roles of higher education and research in modern, globalized, and increasingly complex societies with the most demanding qualification needs

Porous Coordination Polymers based on (bi)pyridinium Ligands

International audienc

Photochromic and Photluminescence Properties of N-substituted-4,4’-Bipyridinium based Complexes

Date du colloque : 10/2012International audienc

N-Methyl-4,4-bipyridinium and N-Methyl-N -oxide-4,4 -bipyridinium Bismuth Complexes - Photochromism and Photoluminescence in the Solid State

Three bismuth complexes based on N-methyl-4,4-bipyridinium (hMV(+)), (hMV)[Bi(hMV)Cl-5] (1), and N-methyl-N-oxide-4,4-bipyridinium (MVO+), [Bi(MVO)X-4(dmso)]center dot dmso [X = Cl (2), Br (3)], are reported. All three compounds show luminescence in the solid state with maxima at 545 nm (yellow for 1) and 560 nm (orange for 2 and 3) with quantum yields up to 10 %. Upon UV irradiation, 1 undergoes a color change from white to blue accompanied by a reduction of the photoluminescence intensity. The analysis of the crystal structure of the three complexes points to a photoinduced charge-transfer (PICT) process at the origin of the photochromism in 1

Photochromism and Solid State Photoluminescence of Bi and Pb Complexes and Coordination Polymers based on N-R-4,4’-bipyridinium entities (R= O-, CH3, CH2CN)

Date du colloque : 05/2013</p

Bipyridinium Ligands: Highly Luminescent Bismuth Complexes

International audienc

Dealing with halophytes: an old problem, the same continuous exciting challenge

[EN] It¿s common sense to usually recognize some concepts as being very simple and accessible. Often, this could lead to a reductionist way in which some problems are regarded and understood. In plant ecology, many concepts are volatile and in nowadays we are using some of them mainly as standard definitions. But in the nature, there are no standards. Only a continuum flux of energy and stable instability that would imply caution and attention in the interpretation of ecological groups of plants. In this work we try to sensitize and pay attention to the complexity of some concepts in plant ecology, and to focus on halophytes, as an example of our intentionThis paper was published with support provided by the POSDRU/89/1.5/S/49944 project “Developing the innovation capacity and improving the impact of research through post-doctoral programmes”.Grigore, MN.; Toma, C.; Boscaiu, M. (2010). Dealing with halophytes: an old problem, the same continuous exciting challenge. Analele Stiintifice ale Universitatii "Alexandru Ioan Cuza" din Iasi. Biologie Vegetala. 56(1):21-32. http://hdl.handle.net/10251/101719S213256

Ecological implications of bulliform cells on halophytes, in salt and water stress natural conditions

[EN] Seven Romanian salt-tolerant species were histo-anatomical investigated. These species have been classified by the authors of the present study as ¿amphibious¿ halophytes, related to the field observations and anatomical considerations. All the analyzed taxa present bulliform cells at the foliar epidermis level. Despite the fact that there are different interpretations regarding the bulliform cells role and functional significance, we correlate these structures with the ecological factors, salinity and, respectively, drought conditions.This paper was published with support provided by the POSDRU project “Developing the innovation capacity and improving the impact of research through postdoctoral programmes”.Grigore, MN.; Toma, C.; Boscaiu, M. (2010). Ecological implications of bulliform cells on halophytes, in salt and water stress natural conditions. Analele Stiintifice ale Universitatii "Alexandru Ioan Cuza" din Iasi. Biologie Vegetala. 56(2):5-15. http://hdl.handle.net/10251/101713S51556