Synthesis, spectroscopic and electrochemical properties of substituted bis(phthalocyaninato)lanthanide(III) complexes

Jiang, Jianzhuang; Liu, Roger C.W.; Mak, Thomas C. W.; Chan, T.‐W. Dominic; Ng, Dennis K. P.

doi:10.1016/0277-5387(96)00248-3

Cited by 113 publications

(2 citation statements)

References 32 publications

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“…It is important to mention that the electronic absorption of phthalocyanines depends on the chemical environment such as the type of solvent and its interaction with rare earth metal complexes. Hence, some discrepancies can be found between the UV-vis spectra of MPc 2 complexes in thin films, solution and solid pellets [ 22 , 23 , 24 , 26 , 27 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. The spectra in Figure 4 exhibit the two main characteristic bands of phthalocyanines, the Q and the B or Soret bands [ 26 , 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

Solvothermal Synthesis of Rare Earth Bisphthalocyanines

Bolivar-Pineda,

Mendoza-Domínguez,

Rudolf

et al. 2024

Molecules

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Rare earth bisphthalocyanines (MPc2) are of particular interest because of their behavior as single-molecular magnets, which makes them suitable for applications in molecular spintronics, high-density data storage and quantum computation. Nevertheless, MPc2 are not commercially available, and the synthesis routes are mainly focused on obtaining substituted phthalocyanines. Two preparation routes depend on the precursor: synthesis from phthalonitrile (PN) and the metalation of free or dilithium phthalocyanine (H2Pc and Li2Pc). In both options, byproducts such as free-base phthalocyanine and in the first route additional PN oligomers are generated, which influence the MPc2 yield. There are three preparation methods for these routes: heating, microwave radiation and reflux. In this research, solvothermal synthesis was applied as a new approach to prepare yttrium, lanthanum, gadolinium and terbium unsubstituted bisphthalocyanines using Li2Pc and the rare earth(III) acetylacetonates. Purification by sublimation gave high product yields compared to those reported, namely 68% for YPc2, 43% for LaPc2, 63% for GdPc2 and 62% for TbPc2, without any detectable presence of H2Pc. Characterization by infrared, Raman, ultraviolet–visible and X-ray photoelectron spectroscopy as well as elemental analysis revealed the main featuresof the four bisphthalocyanines, indicating the success of the synthesis of the complexes.

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Section: Resultsmentioning

confidence: 99%

Solvothermal Synthesis of Rare Earth Bisphthalocyanines

Bolivar-Pineda,

Mendoza-Domínguez,

Rudolf

et al. 2024

Molecules

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“…The two compounds used to detect optical difference in the magneto-plasmonic behavior were synthesized according to procedures reported in [30] for the bis-porphyrin derivative and in reference [31] for the terbium phthalocyanine double decker. Both were deposited onto the MP transducers by the Langmuir-Schӓfer technique by using a NIMA trough apparatus [32].…”

Section: Preparation Of the Magneto-optical Transducersmentioning

confidence: 99%

MagnetoPlasmonic Waves/HOMO-LUMO Free π-Electron Transitions Coupling in Organic Macrocycles and Their Effect in Sensing Applications

et al. 2021

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Optical and magneto-optical surface plasmon resonance (MOSPR) characterization and preliminary sensing test onto single- and multi-layers of two organic macrocycles have been performed; TbPc2(OC11H21)8 phthalocyanine and CoCoPo2 porphyrin were deposited by the Langmuir-Schäfer (LS) technique onto proper Au/Co/Au magneto-optical transducers. Investigations of the MOSPR properties in Kretschmann configuration by angular modulation, gives us an indication about the potential discrimination of two organic macrocycles with absorption electronic transition in and out of the propagating plasmon energy spectral range. An improved molecular vapors sensitivity increase by the MOSPR sensing probe can be demonstrated depending on the overlap between the plasmonic probe energy and the absorption electronic transitions of the macrocycles under investigation. If the interaction between the plasmon energy and molecular HOMO-LUMO transition is preserved, a variation in the complex refractive index takes place. Under this condition, the magneto-plasmonic effect reported as 1/|MOSPR| signal allows us to increase the detection of molecules deposited onto the plasmonic transducer and their gas sensing capacity. The detection mechanism appears strongly enhanced if the Plasmon Wave/HOMO-LUMO transitions energy are in resonance. Under coupling conditions, a different volatile organic compounds (VOC) sensing capability has been demonstrated using n-butylamine as the trial molecule.

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