Abstract: A method is provided for treating a tobacco material, comprising treating the tobacco material with an ionic liquid. Also provided is a tobacco material which has been treated by such a method, or a derivative thereof, and a smoking article which comprises a tobacco material treated by such a method.

Abstract: A water-soluble dye of the Formula (1): D1-L-D2 ??Formula (1) wherein D1 and D2 each independently is an anthrapyridone, anthrapyrazole, anthrapyrimidine or anthrapyrimidone group; and L is a single covalent bond or a linking group which permits at least partial delocalisation of electrons between D1 and D2, compositions and inks containing the dye, and printing processes, printed material and ink-jet printer cartridges based on use of the dye.

Abstract: Monomers and dimers of mono-azo compounds of formula wherein: D is an optionally substituted aryl or an optionally substituted heteroaryl group; R1 and R2 are each independently optionally substituted alkyl: halo: amino: —NR4R5; wherein R4 is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R5 is optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl or R4 together with R5 and the nitrogen to which they are attached forms an optionally substituted 5 or 6 membered ring: —OR6; wherein R6 is H or optionally substituted alkyl: or —SR7; wherein R7 is optionally substituted alkyl; R3 is amino: halo; —NR4R5; wherein R4 is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R5 is optionally su

Abstract: A compound of Formula (1) and salts thereof: wherein: A and B are each independently selected from the group consisting of —SO3H, —CO2H, —PO3H2, —NHCOR4, alkoxy; R1 and R2 are each independently H or optionally substituted C1-4alkyl; R3 and R4 are each independently optionally substituted C1-4alkyl; m is 1 or 2; and n is 1 to 3. Also compositions, inks, printed material, ink-jet printing processes and ink-jet cartridges.

Abstract: A water-soluble dye of the Formula (1): D1-L-D2 ??Formula (1) wherein: D1 and D2 each independently is an anthrapyridone, anthrapyrazole, anthrapyrimidine or anthrapyrimidone group; and L is a single covalent bond or a linking group which permits at least partial delocalisation of electrons between D1 and D2. Also, compositions and inks, printing processes, printed material and ink-jet printer cartridges.

Abstract: A process for printing an image on a substrate by means of an ink-jet printer which comprises applying thereto a composition comprising a liquid medium and a mono-azo compound of Formula (1) and salts thereof: wherein: D is an optionally substituted aryl group carrying at least one direct substituent selected from the group consisting of —SO3H, —CO2H, —PO3H2 or an optionally substituted nitrogen heteroaryl group carrying at least one direct substituent selected from the group consisting of —SO3H, —CO2H, —PO3H2; R1 is H: optionally substituted alkyl: amino: —NR4R5; wherein R4 is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R5 is optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl: —OR6; wherein R6 is H or optionally substituted alkyl: or —SR7; wherein R7 is optionally substituted alkyl; R

Abstract: A metal chelate compound comprising a compound of the Formula (1) or a salt thereof: wherein: Het is a nitrogen containing heterocycle selected from the group consisting of Formula (2), (3), (4), (5), (6) or (7): R is a substituent; Y is CH3 or COOH; Z is a substituent, n is 0 to 3; p is 0 to 6; q is 0 to 5; r is 0 to 3; and s is 0 to 2. Also compositions and inks, printing processes, printed material and ink-jet printer cartridges.

Abstract: Compounds of Formula (1) and dimers thereof: wherein: A and B independently are optionally substituted aryl or optionally substituted heteroaryl groups; R1 and R2 are each independently optionally substituted alkyl: halo: amino: —NR4R5; wherein R4 is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R5 is optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl or R4 together with R5 and the nitrogen to which they are attached forms an optionally substituted 5 or 6 membered ring: —OR6; wherein R6 is H or optionally substituted alkyl: or —SR7; wherein R7 is optionally substituted alkyl; R3 is optionally substituted alkyl: halo: amino: —NR4R5; wherein R4 is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substitut

Abstract: A metal chelate compound of Formula (1) or a salt thereof: [A-N?N—B]M??Formula (1) wherein: A is an optionally substituted pyridyl ring; and B is of the Formula (2): wherein: X and W are substituents other than H; M is a metal chelated to A-N?N—B; and n is 0 to 4, also claimed are compositions and inks containing a compound of Formula (1), a process for ink jet printing using the inks and an ink jet printer cartridge containing the ink.

Abstract: A metal chelate compound obtainable from contacting a transition metal salt with a compound of the Formula (1) or a salt thereof: wherein p is 1 to 2. Also compositions, inks, printed substrates, ink-jet cartridges and ink-jet printers.

Abstract: A water soluble compound of Formula (1) or a salt thereof: wherein: Y is an electron withdrawing group; Y1 is H, alkyl or aryl, OR or NR2 in which each R independently is H, optionally substituted alkyl or optionally substituted aryl; or Y and Y1 together form a 5- or 6- membered ring; X1 is a group or atom with co-ordinates with M; M is hexa co-ordinate metal; G is a group of Formula (2), (3) or (4); and L1, L2 and L3, each independently represent ligands required to complete hexa-coordinate geometry around metal M; wherein: S is a water solubilizing group; Ar is a benzene or naphthalene group in which X is located ortho to the azo group; X is a group or atom which co-ordinates with M; Z provides atoms or groups which complete an optionally substituted 5- or 6-membered aromatic heterocyclic ring; Ring A is an optionally substituted aromatic ring; Ring B is an optionally substituted 5- or 6-membered aromatic heterocyclic ring; n is 0, 1, 2 or 3; and the * signify the points of attachment of t

Abstract: A water soluble compound of Formula (1) or a salt thereof: wherein: