M. Scholl, S. Ding, C. W. Lee, and R. H. Grubbs, Synthesis and Activity of a New Generation of Ruthenium-Based Olefin Metathesis Catalysts Coordinated with 1,3-Dimesityl-4,5-Dihydroimidazol-2-Ylidene Ligands §, Org. Lett, vol.1, pp.953-956, 1999.

E. A. Kantchev, C. J. O'brien, and M. G. Organ, Palladium Complexes of N-Heterocyclic Carbenes as Catalysts for Cross-Coupling Reactions-A Synthetic Chemist's Perspective, Angew. Chem. Int. Ed, vol.46, pp.2768-2813, 2007.

M. N. Hopkinson, C. Richter, M. Schedler, and F. Glorius, An Overview of N-Heterocyclic Carbenes, Nature, vol.510, pp.485-496, 2014.

G. C. Fortman and S. P. Nolan, N-Heterocyclic Carbene (NHC) Ligands and Palladium in Homogeneous Cross-Coupling Catalysis: A Perfect Union, Chem. Soc. Rev, vol.40, issue.10, pp.5151-5169, 2011.

S. Díez-gonzález, N. Marion, and S. P. Nolan, N-Heterocyclic Carbenes in Late Transition Metal Catalysis, Chem. Rev, vol.109, pp.3612-3676, 2009.

R. H. Crabtree, Organometallic Alkane CH Activation, J. Organomet. Chem, vol.689, pp.4083-4091, 2004.

C. S. Ponseca, P. Chábera, J. Uhlig, P. Persson, and V. Sundström, Ultrafast Electron Dynamics in Solar Energy Conversion, Chem. Rev, vol.117, pp.10940-11024, 2017.

T. Duchanois, L. Liu, M. Pastore, A. Monari, C. Cebrián et al., Based Iron Sensitizers for DSSCs. Inorganics, vol.6, p.63, 2018.

L. Lindh, P. Chábera, N. W. Rosemann, J. Uhlig, K. Wärnmark et al., Photophysics and Photochemistry of Iron Carbene Complexes for Solar Energy Conversion and Photocatalysis, vol.2020, p.315

O. S. Wenger, Photoactive Complexes with Earth-Abundant Metals, J. Am. Chem. Soc, vol.140, pp.13522-13533, 2018.

J. K. Mccusker, Electronic Structure in the Transition Metal Block and Its Implications for Light Harvesting, Science, vol.363, pp.484-488, 2019.

J. D. Braun, I. B. Lozada, C. Kolodziej, C. Burda, K. M. Newman et al., Iron(Ii) Coordination Complexes with Panchromatic Absorption and Nanosecond Charge-Transfer Excited State Lifetimes, Nat. Chem, vol.11, pp.1144-1150, 2019.

E. Marchini, M. Darari, L. Lazzarin, R. Boaretto, R. Argazzi et al., Recombination and Regeneration Dynamics in FeNHC (II)-Sensitized Solar Cells, Chem. Commun, vol.56, pp.543-546, 2020.
URL : https://hal.archives-ouvertes.fr/hal-02410187

H. Tatsuno, K. S. Kjaer, K. Kunnus, T. C. Harlang, C. Timm et al., Hot Branching Dynamics in a Light-Harvesting Iron Carbene Complex Revealed by Ultrafast X-ray Emission Spectroscopy, Angew. Chem. Int. Ed, vol.2020, pp.364-372

C. D. Clark, M. Z. Hoffman, D. Paul-rillema, and Q. G. Mulazzani, Photophysics of Ruthenium(II) Complexes with 2-(2?-Pyridyl) Pyrimidine and 2,2?-Bipyridine Ligands in Fluid Solution, J. Photochem. Photobiol. Chem, vol.110, pp.285-290, 1997.

C. Consani, M. Prémont-schwarz, A. Elnahhas, C. Bressler, F. Van-mourik et al., Vibrational Coherences and Relaxation in the High-Spin State of Aqueous [Fe II (Bpy) 3 ] 2+, Angew. Chem. Int. Ed, vol.48, pp.7184-7187, 2009.

A. Cannizzo, F. Van-mourik, W. Gawelda, G. Zgrablic, C. Bressler et al., Fluorescence Spectroscopy, vol.45, pp.3174-3176, 2006.

J. K. Mccusker, K. N. Walda, R. C. Dunn, J. D. Simon, D. Magde et al., 5T2 Intersystem Crossing of Low-Spin Polypyridyl Ferrous Complexes, J. Am. Chem. Soc, vol.115, pp.298-307, 1993.

J. E. Monat and J. K. Mccusker, Femtosecond Excited-State Dynamics of an Iron(II) Polypyridyl Solar Cell Sensitizer Model, J. Am. Chem. Soc, vol.122, pp.4092-4097, 2000.

Y. Liu, P. Persson, V. Sundström, and K. Wärnmark, Fe N -Heterocyclic Carbene Complexes as Promising Photosensitizers, Acc. Chem. Res, vol.49, pp.1477-1485, 2016.

S. Kaufhold and K. Wärnmark, Design and Synthesis of Photoactive Iron N-Heterocyclic Carbene Complexes, vol.2020, p.132

P. Chábera, K. S. Kjaer, O. Prakash, A. Honarfar, Y. Liu et al., Fe II Hexa N -Heterocyclic Carbene Complex with a 528 Ps Metal-to-Ligand Charge-Transfer Excited-State Lifetime, J. Phys. Chem. Lett, vol.9, pp.459-463, 2018.

A. Francés-monerris, P. C. Gros, M. Pastore, X. Assfeld, and A. Monari, Photophysical Properties of Bichromophoric Fe(II) Complexes Bearing an Aromatic Electron Acceptor, Theor. Chem. Acc, vol.138, p.86, 2019.

P. Zimmer, L. Burkhardt, A. Friedrich, J. Steube, A. Neuba et al., The Connection between NHC Ligand Count and Photophysical Properties in Fe(II) Photosensitizers: An Experimental Study, Inorg. Chem, vol.57, pp.360-373, 2018.

J. Steube, L. Burkhardt, A. Päpcke, J. Moll, P. Zimmer et al., Excited-State Kinetics of an Air-Stable Cyclometalated Iron(II) Complex, Chem. -Eur. J, vol.25, pp.11826-11830, 2019.

Y. Liu, T. Harlang, S. E. Canton, P. Chábera, K. Suárez-alcántara et al., Towards Longer-Lived Metal-to-Ligand Charge Transfer States of Iron(Ii) Complexes: An N-Heterocyclic Carbene Approach, Chem. Commun, vol.49, pp.6412-6414, 2013.

T. Duchanois, T. Etienne, C. Cebrián, L. Liu, A. Monari et al., An Iron-Based Photosensitizer with Extended Excited-State Lifetime: Photophysical and Photovoltaic Properties: An Iron-Based Photosensitizer with Extended Excited-State Lifetime, Eur. J. Inorg. Chem, pp.2469-2477, 2015.
URL : https://hal.archives-ouvertes.fr/hal-01495210

L. Liu, T. Duchanois, T. Etienne, A. Monari, M. Beley et al., A New Record Excited State 3 MLCT Lifetime for Metalorganic Iron( II ) Complexes, Phys Chem Chem Phys, vol.18, pp.12550-12556, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01812755

M. Pastore, T. Duchanois, L. Liu, A. Monari, X. Assfeld et al., Interfacial Charge Separation and Photovoltaic Efficiency in Fe( II )-Carbene Sensitized Solar Cells, Phys Chem Chem Phys, vol.18, pp.28069-28081, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01812853

M. Darari, E. Domenichini, A. Francés-monerris, C. Cebrián, K. Magra et al., Iron( II ) Complexes with Diazinyl-NHC Ligands: Impact of ?-Deficiency of the Azine Core on Photophysical Properties, Dalton Trans, vol.48, issue.29, pp.10915-10926, 2019.
URL : https://hal.archives-ouvertes.fr/hal-02145893

A. Francés-monerris, K. Magra, M. Darari, C. Cebrián, M. Beley et al., Synthesis and Computational Study of a Pyridylcarbene Fe(II) Complex: Unexpected Effects of Fac / Mer Isomerism in Metal-to-Ligand Triplet Potential Energy Surfaces, Inorg. Chem, vol.57, pp.10431-10441, 2018.

K. Magra, E. Domenichini, A. Francés-monerris, C. Cebrián, M. Beley et al., Impact of the Fac / Mer Isomerism on the Excited-State Dynamics of Pyridyl-Carbene Fe(II) Complexes, Inorg. Chem, vol.58, pp.5069-5081, 2019.
URL : https://hal.archives-ouvertes.fr/hal-02099506

K. S. Kjaer, N. Kaul, O. Prakash, P. Chábera, N. W. Rosemann et al., Luminescence and Reactivity of a Charge-Transfer Excited Iron Complex with Nanosecond Lifetime, Science, vol.363, pp.249-253, 2019.

A. Francés-monerris, P. C. Gros, X. Assfeld, A. Monari, and M. Pastore, Toward Luminescent Iron Complexes: Unravelling the Photophysics by Computing Potential Energy Surfaces, vol.3, pp.666-683, 2019.

C. J. Stanton, J. E. Vandezande, G. F. Majetich, H. F. Schaefer, J. Agarwal et al., Increasing ? Acidity Lowers the Reduction Potential and Increases the Turnover Frequency for CO 2 Reduction, Inorg. Chem, vol.55, pp.9509-9512, 2016.

T. Samanta, B. Kumar-rana, G. Roymahapatra, S. Giri, P. Mitra et al., Structure and Theoretical Studies of Hg(II)-NH Carbene Complex of Annulated Ligand Pyridinyl[1,2-a]{2-Pyridylimidazol}-3-Ylidene Hexaflurophosphate, Inorganica Chim. Acta, vol.375, pp.271-279, 2011.

M. J. Frisch, G. W. Trucks, H. B. Schlegel, G. E. Scuseria, M. A. Robb et al., Revis, vol.01, 2010.

S. Hirata and M. Head-gordon, Time-Dependent Density Functional Theory within the Tamm-Dancoff Approximation, Chem. Phys. Lett, vol.314, pp.291-299, 1999.

A. D. Boese and N. C. Handy, A New Parametrization of Exchange-Correlation Generalized Gradient Approximation Functionals, J. Chem. Phys, vol.114, pp.5497-5503, 2001.

T. Duchanois, T. Etienne, M. Beley, X. Assfeld, E. A. Perpète et al., Heteroleptic Pyridyl-Carbene Iron Complexes with Tuneable Electronic Properties, Eur. J. Inorg. Chem, pp.3747-3753, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01494414

R. L. Martin, Natural Transition Orbitals, J. Chem. Phys, vol.118, pp.4775-4777, 2003.

T. Etienne, X. Assfeld, and A. Monari, Toward a Quantitative Assessment of Electronic Transitions' Charge-Transfer Character, J. Chem. Theory Comput, vol.10, pp.3896-3905, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01913570

T. Etienne, X. Assfeld, and A. Monari, New Insight into the Topology of Excited States through Detachment/Attachment Density Matrices-Based Centroids of Charge, J. Chem. Theory Comput, vol.10, pp.3906-3914, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01913547

T. Roland, J. Léonard, G. Hernandez-ramirez, S. Méry, O. Yurchenko et al., Sub-100 Fs Charge Transfer in a Novel Donor-Acceptor-Donor Triad Organized in a Smectic Film, Phys Chem Chem Phys, vol.14, pp.273-279, 2012.

J. T. Hutt, Z. D. Aron, and . Efficient, Single-Step Access to Imidazo[1,5-a ]Pyridine N -Heterocyclic Carbene Precursors, Org. Lett, vol.13, pp.5256-5259, 2011.

H. V. Huynh, Electronic Properties of N-Heterocyclic Carbenes and Their Experimental Determination, Chem. Rev, vol.118, pp.9457-9492, 2018.

Y. Koto, F. Shibahara, and T. Murai, Pyridin-3-Ylidenes as ?-Accepting Carbene Ligands: Substituent Effects on Properties of N-Heterocyclic Carbenes, Org. Biomol. Chem, vol.15, pp.1810-1820, 2017.

C. Slavov, H. Hartmann, and J. Wachtveitl, Implementation and Evaluation of Data Analysis Strategies for Time-Resolved Optical Spectroscopy, Anal. Chem, vol.87, pp.2328-2336, 2015.

M. Gueye, M. Manathunga, D. Agathangelou, Y. Orozco, M. Paolino et al., Engineering the Vibrational Coherence of Vision into a Synthetic Molecular Device, Nat. Commun, vol.9, p.313, 2018.
URL : https://hal.archives-ouvertes.fr/hal-02410198

A. Cheminal, J. Léonard, S. Kim, K. Jung, H. Kandori et al., 100 Fs Photo-Isomerization with Vibrational Coherences but Low Quantum Yield in Anabaena Sensory Rhodopsin, Phys. Chem. Chem. Phys, vol.17, pp.25429-25439, 2015.

A. Britz, W. Gawelda, T. A. Assefa, L. L. Jamula, J. T. Yarranton et al., Using Ultrafast X-Ray Spectroscopy To Address Questions in Ligand-Field Theory: The Excited State Spin and Structure of, Inorg. Chem, vol.58, pp.9341-9350, 2019.

B. C. Paulus, S. L. Adelman, L. L. Jamula, and J. K. Mccusker, Leveraging Excited-State Coherence for Synthetic Control of Ultrafast Dynamics, Nature, vol.582, pp.214-218, 2020.

K. S. Kjaer, W. Zhang, R. Alonso-mori, U. Bergmann, M. Chollet et al., Ligand Manipulation of Charge Transfer Excited State Relaxation and Spin Crossover in

. Struct and . Dyn, , vol.4, p.44030, 2017.