scholarly journals Utilization of Guanidine-Based Ancillary Ligands in Arene–Ruthenium Complexes for Selective Cytotoxicity

ACS Omega ◽  
2021 ◽  
Vol 6 (12) ◽  
pp. 8226-8238
Author(s):  
Jit Karmakar ◽  
Promita Nandy ◽  
Saurabh Das ◽  
Debalina Bhattacharya ◽  
Parimal Karmakar ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Selective Cytotoxicity ◽  
Ancillary Ligands

Dual-Emissive Tris-Heteroleptic Ruthenium Complexes: Tuning the DNA-Triggered Ratiometric Emission Response by Ancillary Ligands

2021 ◽  
Author(s):  
Si-Hai Wu ◽  
Rong Yang ◽  
Bin Sun ◽  
Jian-Hong Tang ◽  
Zhong-Liang Gong ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Ancillary Ligands

One bipyridine and triple advantages: tailoring ancillary ligands in ruthenium complexes for efficient sensitization in dye solar cells

2012 ◽  
Vol 22 (36) ◽  
pp. 18757 ◽  
Author(s):  
M. Chandrasekharam ◽  
M. Anil Reddy ◽  
Surya P. Singh ◽  
B. Priyanka ◽  
K. Bhanuprakash ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ruthenium Complexes ◽  
Ancillary Ligands ◽  
Dye Solar Cells

scholarly journals Isonitrile Ruthenium and Iron PNP Complexes: Synthesis, Characterization and Catalytic Assessment for Base-Free Dehydrogenative Coupling of Alcohols

2020 ◽  
Author(s):  
Duc Hanh Nguyen ◽  
Delphine Merel ◽  
Nicolas Merle ◽  
Xavier Trivelli ◽  
Frederic Capet ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Outer Sphere ◽  
Pincer Complexes ◽  
Initial Activity ◽  
Ancillary Ligands ◽  
X Ray ◽  
Bromide Anion ◽  
X Ray Crystallography ◽  
Dehydrogenative Coupling

Neutral and ionic ruthenium and iron aliphatic PNPH-type pincer complexes (PNPH= NH(CH2CH2PiPr2)2) bearing benzyl, n-butyl or tert-butyl isocyanide ancillary ligands have been prepared and characterized. Reaction of [RuCl2(PNPH)]2 with one equivalent CN-R per ruthe-nium center affords complexes [Ru(PNPH)Cl2(CNR)] (R= benzyl, 1a, R= n-butyl, 1b, R= t-butyl, 1c), with cationic [Ru(PNPH)(Cl)(CNR)2]Cl 2a-c as side-products. Complexes 2a-c are selectively prepared upon reaction of [RuCl2(PNPH)]2 with 2 equiva-lents of isonitrile per ruthenium center. Dichloride species 1a-c react with excess NaBH4 to afford [Ru(PNPH)(H)(BH4)(CN-R)] 3a-c, analogues to benchmark Takasago catalyst [Ru(PNP)(H)(BH4)(CO)]. Reaction of 1a-c with a single equivalent of NaBH4 under protic conditions results in formation of hydrido chloride derivatives [Ru(PNPH)(H)(Cl)(CN-R)] (4a-c), from which 3a-c can be prepared upon reaction with excess NaBH4. Use of one equivalent of NaHBEt3 with 4a and 4c affords bishydrides [Ru(PNPH)(H)2(CN-R)] 5a and 5c. In the case of bulkier t-butylisonitrile, two isomers were observed by NMR, with the PNP framework in either meridional or facial confor-mation. Deprotonation of 4c by KOtBu generates amido derivative [Ru(PNP’)(H)(CN-t-Bu)] (6, PNP’= -N(CH2CH2PiPr2)2), unstable in solution. Addition of excess benzylisonitrile to 4a provides cationic hydride [Ru(PNPH)(H)(CN-CH2Ph)2]Cl (7). Concerning iron chemis-try, [Fe(PNPH)Br2] reacts one equivalent benzylisonitrile to afford [Fe(PNPH)(Br)(CNCH2Ph)2]Br (8). The outer-sphere bromide anion can be exchanged by salt metathesis with NaBPh4 to generate [Fe(PNPH)(Br)(CNCH2Ph)2](BPh4) (9). Cationic hydride species [Fe(PNPH)(H)(CN-t-Bu)2](BH4) (10) is prepared from consecutive addition of excess CN-t-Bu and NaBH4 on [Fe(PNPH)Br2]. Ruthenium complexes 3a-c are active in acceptorless alcohol dehydrogenative coupling into ester under base-free conditions. From kinetic follow-up, the trend in initial activity is 3a ≈ 3b > [Ru(PNPH)(H)(BH4)(CO)] >> 3c; for robustness, [Ru(H)(BH4)(CO)(PNPH)] > 3a > 3b >> 3c. Hy-potheses are given to account for the observed deactivation. Complexes 3b, 3c, 4a, 4c, 5c, 7, cis-8 and 9 were characterized by X-ray crystallography.

scholarly journals Isonitrile Ruthenium and Iron PNP Complexes: Synthesis, Characterization and Catalytic Assessment for Base-Free Dehydrogenative Coupling of Alcohols

2020 ◽  
Author(s):  
Duc Hanh Nguyen ◽  
Delphine Merel ◽  
Nicolas Merle ◽  
Xavier Trivelli ◽  
Frederic Capet ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Outer Sphere ◽  
Pincer Complexes ◽  
Initial Activity ◽  
Ancillary Ligands ◽  
X Ray ◽  
Bromide Anion ◽  
X Ray Crystallography ◽  
Dehydrogenative Coupling

Neutral and ionic ruthenium and iron aliphatic PNPH-type pincer complexes (PNPH= NH(CH2CH2PiPr2)2) bearing benzyl, n-butyl or tert-butyl isocyanide ancillary ligands have been prepared and characterized. Reaction of [RuCl2(PNPH)]2 with one equivalent CN-R per ruthe-nium center affords complexes [Ru(PNPH)Cl2(CNR)] (R= benzyl, 1a, R= n-butyl, 1b, R= t-butyl, 1c), with cationic [Ru(PNPH)(Cl)(CNR)2]Cl 2a-c as side-products. Complexes 2a-c are selectively prepared upon reaction of [RuCl2(PNPH)]2 with 2 equiva-lents of isonitrile per ruthenium center. Dichloride species 1a-c react with excess NaBH4 to afford [Ru(PNPH)(H)(BH4)(CN-R)] 3a-c, analogues to benchmark Takasago catalyst [Ru(PNP)(H)(BH4)(CO)]. Reaction of 1a-c with a single equivalent of NaBH4 under protic conditions results in formation of hydrido chloride derivatives [Ru(PNPH)(H)(Cl)(CN-R)] (4a-c), from which 3a-c can be prepared upon reaction with excess NaBH4. Use of one equivalent of NaHBEt3 with 4a and 4c affords bishydrides [Ru(PNPH)(H)2(CN-R)] 5a and 5c. In the case of bulkier t-butylisonitrile, two isomers were observed by NMR, with the PNP framework in either meridional or facial confor-mation. Deprotonation of 4c by KOtBu generates amido derivative [Ru(PNP’)(H)(CN-t-Bu)] (6, PNP’= -N(CH2CH2PiPr2)2), unstable in solution. Addition of excess benzylisonitrile to 4a provides cationic hydride [Ru(PNPH)(H)(CN-CH2Ph)2]Cl (7). Concerning iron chemis-try, [Fe(PNPH)Br2] reacts one equivalent benzylisonitrile to afford [Fe(PNPH)(Br)(CNCH2Ph)2]Br (8). The outer-sphere bromide anion can be exchanged by salt metathesis with NaBPh4 to generate [Fe(PNPH)(Br)(CNCH2Ph)2](BPh4) (9). Cationic hydride species [Fe(PNPH)(H)(CN-t-Bu)2](BH4) (10) is prepared from consecutive addition of excess CN-t-Bu and NaBH4 on [Fe(PNPH)Br2]. Ruthenium complexes 3a-c are active in acceptorless alcohol dehydrogenative coupling into ester under base-free conditions. From kinetic follow-up, the trend in initial activity is 3a ≈ 3b > [Ru(PNPH)(H)(BH4)(CO)] >> 3c; for robustness, [Ru(H)(BH4)(CO)(PNPH)] > 3a > 3b >> 3c. Hy-potheses are given to account for the observed deactivation. Complexes 3b, 3c, 4a, 4c, 5c, 7, cis-8 and 9 were characterized by X-ray crystallography.

Ruthenium Complexes of Substituted Terpyridine and Pyridyl-quinoline Based Ligands with Ancillary Ligands: Synthesis, Characterization, Electrochemical Study and DFT Calculation

2016 ◽  
Vol 1 (12) ◽  
pp. 3276-3287 ◽  
Author(s):  
Binitendra N. Mongal ◽  
Sumita Naskar ◽  
Arunava Pal ◽  
Sayantani Bhattacharya ◽  
Tarun K. Mandal ◽  
...  
Keyword(s):  
Dft Calculation ◽  
Ruthenium Complexes ◽  
Electrochemical Study ◽  
Ancillary Ligands

Effect of electron-donor ancillary ligands on the heteroleptic ruthenium complexes: synthesis, characterization, and application in high-performance dye-sensitized solar cells

2016 ◽  
Vol 18 (16) ◽  
pp. 11213-11219 ◽  
Author(s):  
Wang-Chao Chen ◽  
Fan-Tai Kong ◽  
Xue-Peng Liu ◽  
Fu-Ling Guo ◽  
Li Zhou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Donor ◽  
High Performance ◽  
Dye Sensitized Solar Cells ◽  
Ruthenium Complexes ◽  
Ancillary Ligands ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The effect of different electron-donor ancillary ligands on ruthenium sensitizers and their performance in DSSCs has been investigated.

New dyads using (metallo)porphyrins as ancillary ligands in polypyridine ruthenium complexes. Synthesis and electronic properties

2012 ◽  
Vol 41 (41) ◽  
pp. 12865 ◽  
Author(s):  
Fabien Lachaud ◽  
Christophe Jeandon ◽  
Antonio Monari ◽  
Xavier Assfeld ◽  
Marc Beley ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Ruthenium Complexes ◽  
Ancillary Ligands

scholarly journals Isonitrile Ruthenium and Iron PNP Complexes: Synthesis, Characterization and Catalytic Assessment for Base-Free Dehydrogenative Coupling of Alcohols

2020 ◽  
Author(s):  
Duc Hanh Nguyen ◽  
Delphine Merel ◽  
Nicolas Merle ◽  
Xavier Trivelli ◽  
Frederic Capet ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Outer Sphere ◽  
Pincer Complexes ◽  
Initial Activity ◽  
Ancillary Ligands ◽  
X Ray ◽  
Bromide Anion ◽  
X Ray Crystallography ◽  
Dehydrogenative Coupling

Neutral and ionic ruthenium and iron aliphatic PNPH-type pincer complexes (PNPH= NH(CH2CH2PiPr2)2) bearing benzyl, n-butyl or tert-butyl isocyanide ancillary ligands have been prepared and characterized. Reaction of [RuCl2(PNPH)]2 with one equivalent CN-R per ruthe-nium center affords complexes [Ru(PNPH)Cl2(CNR)] (R= benzyl, 1a, R= n-butyl, 1b, R= t-butyl, 1c), with cationic [Ru(PNPH)(Cl)(CNR)2]Cl 2a-c as side-products. Complexes 2a-c are selectively prepared upon reaction of [RuCl2(PNPH)]2 with 2 equiva-lents of isonitrile per ruthenium center. Dichloride species 1a-c react with excess NaBH4 to afford [Ru(PNPH)(H)(BH4)(CN-R)] 3a-c, analogues to benchmark Takasago catalyst [Ru(PNP)(H)(BH4)(CO)]. Reaction of 1a-c with a single equivalent of NaBH4 under protic conditions results in formation of hydrido chloride derivatives [Ru(PNPH)(H)(Cl)(CN-R)] (4a-c), from which 3a-c can be prepared upon reaction with excess NaBH4. Use of one equivalent of NaHBEt3 with 4a and 4c affords bishydrides [Ru(PNPH)(H)2(CN-R)] 5a and 5c. In the case of bulkier t-butylisonitrile, two isomers were observed by NMR, with the PNP framework in either meridional or facial confor-mation. Deprotonation of 4c by KOtBu generates amido derivative [Ru(PNP’)(H)(CN-t-Bu)] (6, PNP’= -N(CH2CH2PiPr2)2), unstable in solution. Addition of excess benzylisonitrile to 4a provides cationic hydride [Ru(PNPH)(H)(CN-CH2Ph)2]Cl (7). Concerning iron chemis-try, [Fe(PNPH)Br2] reacts one equivalent benzylisonitrile to afford [Fe(PNPH)(Br)(CNCH2Ph)2]Br (8). The outer-sphere bromide anion can be exchanged by salt metathesis with NaBPh4 to generate [Fe(PNPH)(Br)(CNCH2Ph)2](BPh4) (9). Cationic hydride species [Fe(PNPH)(H)(CN-t-Bu)2](BH4) (10) is prepared from consecutive addition of excess CN-t-Bu and NaBH4 on [Fe(PNPH)Br2]. Ruthenium complexes 3a-c are active in acceptorless alcohol dehydrogenative coupling into ester under base-free conditions. From kinetic follow-up, the trend in initial activity is 3a ≈ 3b > [Ru(PNPH)(H)(BH4)(CO)] >> 3c; for robustness, [Ru(H)(BH4)(CO)(PNPH)] > 3a > 3b >> 3c. Hy-potheses are given to account for the observed deactivation. Complexes 3b, 3c, 4a, 4c, 5c, 7, cis-8 and 9 were characterized by X-ray crystallography.

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