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[ES] Uso de un compuesto fluorescente como componente de tinta de seguridad y tinta de seguridad. La presente invención se refiere al uso del compuesto fluorescente de fórmula (I), cuya frecuencia de emisión varía en respuesta a distintos estímulos externos, como componente de tinta de seguridad. La presente invención también se refiere a la tinta de seguridad que comprende dicho compuesto., [EN] Use of a fluorescent compound as a component of security ink and security ink. The present invention refers to the use of the fluorescent compound of formula (I), whose emission frequency varies in response to different external stimuli, as a security ink component. The present invention also relates to the security ink comprising said compound.

[EN] The present invention relates to the use of a fluorescent compound of formula (I), the emission frequency of which varies in response to different external stimuli, as a security ink component. The invention also relates to the security ink comprising said compound., [ES] La presente invención se refiere al uso del compuesto fluorescente de fórmula (I), cuya frecuencia de emisión varía en respuesta a distintos estímulos externos, como componente de tinta de seguridad. La presente invención también se refiere a la tinta de seguridad que comprende dicho compuesto., [FR] La présente invention se rapporte à l'utilisation du composé fluorescent de formule (I), dont la fréquence d'émission varie en réponse à différents stimuli externe, comme constituant d'encre de sécurité. La présente invention concerne également l'encre de sécurité qui comprend ledit composé.

In the present work, we investigate two-dimensional (2D) conjugated polymers based on C3-symmetric truxene-based cores at the density functional theory (DFT) level. In total, 27 different 2D polymers have been exhaustively studied with the aim to explore the impact of the following effects on the electronic and charge-transport properties: (i) the nature of the conjugated platform, going from electron-rich truxene (Tx) and triindole (Tr) units to electron-deficient truxenone (To) cores, (ii) the spacing of the cores with different bridges, i.e., phenylene (Ph) or ethynylene (A) units, (iii) the linker position (2,7,12-substitution in the T2 polymers and 3,8,13-substitution in T3 polymers), and (iv) the increased number of ¿-bridges connecting the cores, from three linkers in T2 and T3 to six linkers in T2,3. To this end, we have carried out a large battery of DFT calculations on fragments extracted from the 2D polymers (dimers and trimers) as well as on the corresponding periodic 2D structures (infinite monolayers and self-assembled monolayers) using periodic boundary conditions. Our results show that simultaneous manipulation of the pore surface size and band-gap engineering together with charge-transport parameters can be achieved in these truxene-based 2D polymers by fine-tuning their structural features. The contributions of this study to the overall understanding of the structure¿electronic property relationships of these semiconducting polymers and its correlation with available experimental work are highlighted. Our results provide interesting guidelines to design novel 2D materials with applications ranging from sensing to photocatalysis or electronics.

Three platinum complexes with cis and trans configuration cis-[Pt(TCEP)2Cl2], cis-[Pt(tmTCEP)2Cl2] and trans-[Pt(TCEP)2Cl2], where TCEP is tris(2-carboxyethyl)phosphine, have been synthesized and fully characterized by usual techniques including single-crystal X-ray diffraction for trans-[Pt(TCEP)2Cl2] and cis-[Pt(tmTCEP)2Cl2]. Here, we also report on an esterification process of TCEP, which takes place in the presence of alcohols, leading to a platinum complex coordinated to an ester tmTCEP (2-methoxycarbonylethyl phosphine) ligand. The stability in solution of the three compounds and their interaction with biological models such as DNA (pBR322 and calf thymus DNA) and proteins (lysozyme and RNase) have also been studied.